Attachment 109817 Details for Bug 85670 – Dmesg output with drm.debug=14

Dmesg output with drm.debug=14

dm (text/plain), 251.97 KB, created by Andrzej Pronobis on 2014-11-21 21:19:31 UTC

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Creator: Andrzej Pronobis

Created: 2014-11-21 21:19:31 UTC

Size: 251.97 KB

patch

obsolete

>[  130.418926] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  130.419821] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.420714] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.421756] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.422653] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.423554] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.424451] ------------[ cut here ]------------
>[  130.424464] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  130.424465] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  130.424488]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  130.424509] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  130.424510] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  130.424519] Workqueue: events i915_hotplug_work_func [i915]
>[  130.424521]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  130.424523]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  130.424525]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  130.424527] Call Trace:
>[  130.424530]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  130.424532]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  130.424535]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  130.424547]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  130.424560]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  130.424572]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  130.424584]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  130.424594]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  130.424596]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  130.424598]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  130.424600]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  130.424603]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  130.424605]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.424607]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  130.424610]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.424611] ---[ end trace efdbe4ce60fe98e5 ]---
>[  130.425545] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.426161] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.426770] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.427077] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  130.433190] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  130.433470] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  130.467718] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  130.468033] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  130.468965] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.469595] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.470211] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.471122] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.472022] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.472932] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.481104] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  130.481271] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  130.481436] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  130.481438] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  130.894382] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  130.894386] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 0
>[  130.894410] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  130.894413] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  130.894414] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  130.894918] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  130.895239] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  130.896176] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.897661] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.898284] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.899195] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  130.900100] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.900995] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.901904] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.902811] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.903714] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.904613] ------------[ cut here ]------------
>[  130.904652] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  130.904654] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  130.904685]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  130.904716] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  130.904718] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  130.904733] Workqueue: events i915_hotplug_work_func [i915]
>[  130.904735]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  130.904738]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  130.904741]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  130.904744] Call Trace:
>[  130.904751]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  130.904756]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  130.904759]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  130.904777]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  130.904795]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  130.904812]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  130.904828]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  130.904843]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  130.904846]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  130.904849]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  130.904852]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  130.904855]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  130.904858]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.904861]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  130.904865]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.904866] ---[ end trace efdbe4ce60fe98e6 ]---
>[  130.905803] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.906435] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.907051] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.907957] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  130.908857] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.909755] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.910668] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.911567] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.912465] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.913363] ------------[ cut here ]------------
>[  130.913378] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  130.913378] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  130.913402]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  130.913423] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  130.913424] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  130.913435] Workqueue: events i915_hotplug_work_func [i915]
>[  130.913436]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  130.913438]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  130.913440]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  130.913443] Call Trace:
>[  130.913446]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  130.913448]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  130.913450]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  130.913464]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  130.913477]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  130.913489]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  130.913501]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  130.913511]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  130.913513]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  130.913515]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  130.913518]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  130.913520]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  130.913522]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.913525]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  130.913527]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.913528] ---[ end trace efdbe4ce60fe98e7 ]---
>[  130.914473] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.915088] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.915779] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.916683] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  130.917574] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.918480] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.919377] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.920283] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.921156] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.922000] ------------[ cut here ]------------
>[  130.922014] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  130.922015] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  130.922038]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  130.922059] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  130.922061] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  130.922071] Workqueue: events i915_hotplug_work_func [i915]
>[  130.922072]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  130.922074]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  130.922076]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  130.922078] Call Trace:
>[  130.922081]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  130.922084]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  130.922086]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  130.922099]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  130.922111]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  130.922124]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  130.922135]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  130.922146]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  130.922148]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  130.922150]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  130.922152]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  130.922154]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  130.922157]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.922159]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  130.922161]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.922163] ---[ end trace efdbe4ce60fe98e8 ]---
>[  130.923095] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.923711] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.924317] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.925337] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  130.926234] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.927130] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.928030] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.928928] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.929828] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.930729] ------------[ cut here ]------------
>[  130.930743] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  130.930744] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  130.930768]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  130.930789] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  130.930790] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  130.930800] Workqueue: events i915_hotplug_work_func [i915]
>[  130.930801]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  130.930803]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  130.930805]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  130.930807] Call Trace:
>[  130.930810]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  130.930813]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  130.930815]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  130.930828]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  130.930841]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  130.930853]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  130.930865]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  130.930876]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  130.930878]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  130.930880]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  130.930882]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  130.930884]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  130.930887]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.930889]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  130.930891]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.930893] ---[ end trace efdbe4ce60fe98e9 ]---
>[  130.931824] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.932436] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.933049] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.933954] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  130.934852] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.935763] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.936671] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.937572] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.938482] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.939380] ------------[ cut here ]------------
>[  130.939396] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  130.939397] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  130.939420]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  130.939441] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  130.939442] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  130.939453] Workqueue: events i915_hotplug_work_func [i915]
>[  130.939454]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  130.939457]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  130.939459]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  130.939461] Call Trace:
>[  130.939465]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  130.939467]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  130.939470]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  130.939483]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  130.939496]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  130.939509]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  130.939521]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  130.939532]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  130.939534]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  130.939536]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  130.939538]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  130.939541]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  130.939543]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.939545]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  130.939548]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.939549] ---[ end trace efdbe4ce60fe98ea ]---
>[  130.940481] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.941101] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.941705] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.942610] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  130.943504] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.944397] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.945298] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.946205] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.947102] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.947999] ------------[ cut here ]------------
>[  130.948012] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  130.948013] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  130.948036]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  130.948057] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  130.948058] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  130.948068] Workqueue: events i915_hotplug_work_func [i915]
>[  130.948069]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  130.948072]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  130.948074]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  130.948076] Call Trace:
>[  130.948079]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  130.948081]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  130.948084]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  130.948097]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  130.948110]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  130.948122]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  130.948134]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  130.948144]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  130.948146]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  130.948148]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  130.948150]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  130.948153]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  130.948155]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.948157]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  130.948160]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  130.948161] ---[ end trace efdbe4ce60fe98eb ]---
>[  130.949093] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.949714] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.950322] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.950630] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  130.958082] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  130.958362] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  130.992608] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  130.992923] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  130.993854] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.994473] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  130.995088] [drm:intel_dp_start_link_train] clock recovery OK
>[  130.995999] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.996900] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  130.997923] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  130.998826] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.006010] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  131.006179] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  131.006336] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  131.006338] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  131.418829] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  131.418833] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 1
>[  131.418857] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  131.418859] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  131.418860] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  131.419367] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  131.419689] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  131.420626] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.422112] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  131.422728] [drm:intel_dp_start_link_train] clock recovery OK
>[  131.423639] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  131.424542] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.425446] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.426347] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.434718] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  131.434882] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  131.435161] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  131.469412] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  131.469728] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  131.469882] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  131.469884] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  131.847451] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  131.847456] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 2
>[  131.847470] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  131.847472] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  131.847475] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  131.847972] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  131.848299] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  131.849245] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.850739] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  131.851422] [drm:intel_dp_start_link_train] clock recovery OK
>[  131.852337] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  131.853244] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.854146] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.855063] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.855992] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.856903] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.857813] ------------[ cut here ]------------
>[  131.857857] WARNING: CPU: 1 PID: 71 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  131.857859] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  131.857899]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  131.857937] CPU: 1 PID: 71 Comm: kworker/1:2 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  131.857939] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  131.857958] Workqueue: events i915_hotplug_work_func [i915]
>[  131.857960]  0000000000000009 ffff8800d739fc88 ffffffff8277fcbc 0000000000000000
>[  131.857964]  ffff8800d739fcc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  131.857967]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff8800d739fcd0
>[  131.857971] Call Trace:
>[  131.857979]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  131.857985]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  131.857989]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  131.858012]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  131.858034]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  131.858055]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  131.858075]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  131.858093]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  131.858097]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  131.858101]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  131.858104]  [<ffffffff8278294d>] ? __schedule+0x39d/0x890
>[  131.858108]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  131.858112]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  131.858116]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.858120]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  131.858124]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.858126] ---[ end trace efdbe4ce60fe98ec ]---
>[  131.859077] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.859703] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  131.860328] [drm:intel_dp_start_link_train] clock recovery OK
>[  131.861244] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  131.862146] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.863056] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.863981] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.864882] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.865783] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.866682] ------------[ cut here ]------------
>[  131.866695] WARNING: CPU: 1 PID: 71 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  131.866696] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  131.866719]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  131.866739] CPU: 1 PID: 71 Comm: kworker/1:2 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  131.866741] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  131.866750] Workqueue: events i915_hotplug_work_func [i915]
>[  131.866751]  0000000000000009 ffff8800d739fc88 ffffffff8277fcbc 0000000000000000
>[  131.866754]  ffff8800d739fcc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  131.866756]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff8800d739fcd0
>[  131.866758] Call Trace:
>[  131.866760]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  131.866763]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  131.866765]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  131.866778]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  131.866790]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  131.866802]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  131.866814]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  131.866825]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  131.866827]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  131.866829]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  131.866831]  [<ffffffff8278294d>] ? __schedule+0x39d/0x890
>[  131.866833]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  131.866835]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  131.866838]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.866840]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  131.866842]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.866844] ---[ end trace efdbe4ce60fe98ed ]---
>[  131.867777] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.868392] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  131.868995] [drm:intel_dp_start_link_train] clock recovery OK
>[  131.869907] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  131.870802] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.871722] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.872633] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.873530] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.874429] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.875328] ------------[ cut here ]------------
>[  131.875340] WARNING: CPU: 1 PID: 71 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  131.875341] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  131.875364]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  131.875385] CPU: 1 PID: 71 Comm: kworker/1:2 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  131.875386] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  131.875395] Workqueue: events i915_hotplug_work_func [i915]
>[  131.875396]  0000000000000009 ffff8800d739fc88 ffffffff8277fcbc 0000000000000000
>[  131.875398]  ffff8800d739fcc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  131.875400]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff8800d739fcd0
>[  131.875403] Call Trace:
>[  131.875405]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  131.875408]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  131.875410]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  131.875422]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  131.875435]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  131.875447]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  131.875467]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  131.875484]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  131.875493]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  131.875496]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  131.875498]  [<ffffffff8278294d>] ? __schedule+0x39d/0x890
>[  131.875500]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  131.875502]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  131.875504]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.875507]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  131.875509]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.875510] ---[ end trace efdbe4ce60fe98ee ]---
>[  131.876462] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.877053] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  131.877658] [drm:intel_dp_start_link_train] clock recovery OK
>[  131.878563] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  131.879461] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.880362] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.881268] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.882167] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.883076] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.883997] ------------[ cut here ]------------
>[  131.884009] WARNING: CPU: 1 PID: 71 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  131.884010] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  131.884033]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  131.884053] CPU: 1 PID: 71 Comm: kworker/1:2 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  131.884055] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  131.884064] Workqueue: events i915_hotplug_work_func [i915]
>[  131.884065]  0000000000000009 ffff8800d739fc88 ffffffff8277fcbc 0000000000000000
>[  131.884067]  ffff8800d739fcc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  131.884069]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff8800d739fcd0
>[  131.884071] Call Trace:
>[  131.884074]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  131.884076]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  131.884078]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  131.884090]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  131.884103]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  131.884115]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  131.884126]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  131.884136]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  131.884138]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  131.884140]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  131.884142]  [<ffffffff8278294d>] ? __schedule+0x39d/0x890
>[  131.884144]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  131.884147]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  131.884149]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.884151]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  131.884154]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.884155] ---[ end trace efdbe4ce60fe98ef ]---
>[  131.885088] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.885701] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  131.886305] [drm:intel_dp_start_link_train] clock recovery OK
>[  131.887212] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  131.888291] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.889187] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.890087] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.890985] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.891904] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.892809] ------------[ cut here ]------------
>[  131.892823] WARNING: CPU: 1 PID: 71 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  131.892824] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  131.892847]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  131.892868] CPU: 1 PID: 71 Comm: kworker/1:2 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  131.892869] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  131.892879] Workqueue: events i915_hotplug_work_func [i915]
>[  131.892880]  0000000000000009 ffff8800d739fc88 ffffffff8277fcbc 0000000000000000
>[  131.892883]  ffff8800d739fcc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  131.892885]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff8800d739fcd0
>[  131.892887] Call Trace:
>[  131.892890]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  131.892892]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  131.892894]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  131.892907]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  131.892920]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  131.892932]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  131.892944]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  131.892954]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  131.892956]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  131.892958]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  131.892960]  [<ffffffff8278294d>] ? __schedule+0x39d/0x890
>[  131.892962]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  131.892965]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  131.892967]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.892969]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  131.892972]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  131.892973] ---[ end trace efdbe4ce60fe98f0 ]---
>[  131.893906] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.894524] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  131.895136] [drm:intel_dp_start_link_train] clock recovery OK
>[  131.896058] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  131.896956] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.897855] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  131.898759] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  131.907508] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  131.907670] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  131.907948] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  131.942219] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  131.942536] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  131.942695] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  131.942697] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  132.315302] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  132.315306] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 0
>[  132.315329] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  132.315331] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  132.315332] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  132.315823] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  132.316141] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  132.317103] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.318599] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.319222] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.320138] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.321053] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.321956] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.322866] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.323784] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.324710] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.325626] ------------[ cut here ]------------
>[  132.325672] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.325674] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.325719]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.325759] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.325762] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.325782] Workqueue: events i915_hotplug_work_func [i915]
>[  132.325785]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.325790]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.325794]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.325798] Call Trace:
>[  132.325807]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.325813]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.325818]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.325843]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.325867]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.325891]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.325913]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.325934]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.325938]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.325942]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.325946]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.325950]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.325955]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.325960]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.325964]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.325967] ---[ end trace efdbe4ce60fe98f1 ]---
>[  132.326914] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.327552] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.328141] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.329033] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.329935] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.330849] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.331706] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.332643] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.333585] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.334492] ------------[ cut here ]------------
>[  132.334516] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.334518] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.334559]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.334596] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.334598] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.334615] Workqueue: events i915_hotplug_work_func [i915]
>[  132.334617]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.334621]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.334625]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.334629] Call Trace:
>[  132.334634]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.334639]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.334643]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.334665]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.334688]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.334709]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.334730]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.334749]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.334753]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.334756]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.334760]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.334764]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.334768]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.334772]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.334777]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.334779] ---[ end trace efdbe4ce60fe98f2 ]---
>[  132.335723] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.336351] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.336975] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.337987] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.338895] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.339798] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.340726] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.341632] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.342538] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.343442] ------------[ cut here ]------------
>[  132.343464] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.343465] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.343504]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.343538] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.343540] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.343556] Workqueue: events i915_hotplug_work_func [i915]
>[  132.343558]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.343561]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.343565]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.343568] Call Trace:
>[  132.343573]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.343578]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.343582]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.343602]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.343623]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.343643]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.343662]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.343680]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.343684]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.343687]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.343690]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.343694]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.343698]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.343702]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.343706]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.343708] ---[ end trace efdbe4ce60fe98f3 ]---
>[  132.344652] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.345339] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.345949] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.346861] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.347767] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.348691] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.349604] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.350512] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.351422] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.352333] ------------[ cut here ]------------
>[  132.352353] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.352355] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.352391]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.352423] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.352425] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.352440] Workqueue: events i915_hotplug_work_func [i915]
>[  132.352442]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.352445]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.352449]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.352452] Call Trace:
>[  132.352456]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.352460]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.352464]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.352483]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.352502]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.352521]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.352540]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.352557]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.352560]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.352563]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.352566]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.352570]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.352574]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.352577]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.352581]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.352583] ---[ end trace efdbe4ce60fe98f4 ]---
>[  132.353525] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.354147] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.354758] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.355668] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.356584] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.357496] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.358405] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.359312] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.360219] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.361128] ------------[ cut here ]------------
>[  132.361148] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.361149] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.361186]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.361219] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.361221] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.361236] Workqueue: events i915_hotplug_work_func [i915]
>[  132.361238]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.361241]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.361245]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.361248] Call Trace:
>[  132.361252]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.361256]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.361260]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.361279]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.361299]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.361318]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.361336]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.361353]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.361356]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.361359]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.361363]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.361366]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.361370]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.361374]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.361378]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.361380] ---[ end trace efdbe4ce60fe98f5 ]---
>[  132.362324] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.362946] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.363557] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.364472] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.365373] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.366275] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.367189] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.368096] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.369001] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.369905] ------------[ cut here ]------------
>[  132.369926] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.369927] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.369962]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.369994] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.369996] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.370011] Workqueue: events i915_hotplug_work_func [i915]
>[  132.370012]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.370016]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.370019]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.370022] Call Trace:
>[  132.370026]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.370030]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.370033]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.370052]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.370071]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.370089]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.370107]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.370122]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.370126]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.370129]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.370132]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.370135]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.370139]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.370142]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.370146]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.370148] ---[ end trace efdbe4ce60fe98f6 ]---
>[  132.371087] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.371845] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.372454] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.372765] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  132.380477] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  132.380759] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  132.415114] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  132.415428] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  132.416360] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.416981] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.417593] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.418495] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.419392] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.420292] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.421285] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.422190] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.423090] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.423991] ------------[ cut here ]------------
>[  132.424009] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.424010] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.424034]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.424056] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.424057] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.424069] Workqueue: events i915_hotplug_work_func [i915]
>[  132.424070]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.424072]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.424074]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.424076] Call Trace:
>[  132.424080]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.424083]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.424085]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.424100]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.424113]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.424126]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.424139]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.424150]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.424152]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.424154]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.424156]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.424158]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.424161]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.424163]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.424165]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.424167] ---[ end trace efdbe4ce60fe98f7 ]---
>[  132.425117] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.425735] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.426340] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.427246] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.428139] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.429044] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.429944] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.430849] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.431746] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.432672] ------------[ cut here ]------------
>[  132.432685] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.432686] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.432709]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.432730] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.432731] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.432741] Workqueue: events i915_hotplug_work_func [i915]
>[  132.432742]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.432744]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.432746]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.432748] Call Trace:
>[  132.432752]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.432754]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.432756]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.432769]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.432782]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.432794]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.432805]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.432816]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.432818]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.432820]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.432822]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.432824]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.432827]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.432829]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.432831]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.432833] ---[ end trace efdbe4ce60fe98f8 ]---
>[  132.433764] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.434380] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.434996] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.435904] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.436815] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.437708] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.438610] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.439508] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.440405] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.441309] ------------[ cut here ]------------
>[  132.441321] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.441322] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.441345]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.441366] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.441367] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.441376] Workqueue: events i915_hotplug_work_func [i915]
>[  132.441377]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.441379]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.441381]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.441383] Call Trace:
>[  132.441386]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.441388]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.441391]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.441403]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.441415]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.441427]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.441439]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.441449]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.441451]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.441453]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.441455]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.441458]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.441460]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.441462]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.441465]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.441466] ---[ end trace efdbe4ce60fe98f9 ]---
>[  132.442396] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.443015] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.443623] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.444528] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.445573] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.446472] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.447371] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.448272] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.449175] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.450072] ------------[ cut here ]------------
>[  132.450085] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.450086] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.450109]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.450130] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.450131] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.450141] Workqueue: events i915_hotplug_work_func [i915]
>[  132.450142]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.450144]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.450146]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.450148] Call Trace:
>[  132.450151]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.450153]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.450156]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.450168]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.450180]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.450192]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.450204]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.450214]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.450217]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.450219]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.450221]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.450223]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.450225]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.450228]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.450230]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.450231] ---[ end trace efdbe4ce60fe98fa ]---
>[  132.451163] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.451777] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.452381] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.453285] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.454180] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.455074] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.455980] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.456894] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.457796] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.458696] ------------[ cut here ]------------
>[  132.458709] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.458709] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.458732]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.458753] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.458755] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.458764] Workqueue: events i915_hotplug_work_func [i915]
>[  132.458765]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.458767]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.458769]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.458771] Call Trace:
>[  132.458774]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.458777]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.458779]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.458791]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.458803]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.458815]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.458827]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.458837]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.458840]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.458842]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.458843]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.458846]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.458848]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.458850]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.458853]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.458854] ---[ end trace efdbe4ce60fe98fb ]---
>[  132.459786] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.460406] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.461010] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.461915] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.462807] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.463704] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.464612] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.465506] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.466404] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.467309] ------------[ cut here ]------------
>[  132.467321] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.467322] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.467345]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.467367] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.467368] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.467377] Workqueue: events i915_hotplug_work_func [i915]
>[  132.467378]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.467381]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.467383]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.467385] Call Trace:
>[  132.467387]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.467390]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.467392]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.467404]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.467417]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.467428]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.467440]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.467450]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.467452]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.467454]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.467456]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.467459]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.467461]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.467463]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.467466]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.467467] ---[ end trace efdbe4ce60fe98fc ]---
>[  132.468399] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.469016] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.469621] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.469928] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  132.476631] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  132.476792] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  132.476793] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  132.891963] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  132.891966] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 1
>[  132.891989] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  132.891991] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  132.891992] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  132.892483] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  132.892800] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  132.893763] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.895262] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.895887] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.896804] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.897733] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.898645] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.899555] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.900463] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.901376] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.902290] ------------[ cut here ]------------
>[  132.902341] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.902343] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.902391]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.902435] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.902438] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.902459] Workqueue: events i915_hotplug_work_func [i915]
>[  132.902462]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.902467]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.902471]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.902476] Call Trace:
>[  132.902485]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.902491]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.902496]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.902524]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.902551]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.902576]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.902600]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.902622]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.902627]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.902631]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.902635]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.902640]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.902645]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.902650]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.902655]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.902658] ---[ end trace efdbe4ce60fe98fd ]---
>[  132.903605] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.904237] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.904853] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.905791] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.906695] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.907600] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.908510] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.909419] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.910330] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.911246] ------------[ cut here ]------------
>[  132.911270] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.911271] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.911314]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.911353] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.911356] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.911374] Workqueue: events i915_hotplug_work_func [i915]
>[  132.911376]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.911380]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.911384]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.911388] Call Trace:
>[  132.911394]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.911398]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.911403]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.911426]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.911449]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.911472]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.911494]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.911513]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.911517]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.911521]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.911525]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.911529]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.911534]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.911538]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.911542]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.911545] ---[ end trace efdbe4ce60fe98fe ]---
>[  132.912489] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.913114] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.913739] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.914654] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.915567] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.916476] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.917387] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.918296] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.919206] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.920118] ------------[ cut here ]------------
>[  132.920140] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.920142] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.920182]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.920220] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.920222] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.920239] Workqueue: events i915_hotplug_work_func [i915]
>[  132.920241]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.920244]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.920248]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.920252] Call Trace:
>[  132.920257]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.920261]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.920265]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.920287]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.920308]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.920329]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.920350]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.920369]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.920373]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.920376]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.920380]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.920384]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.920389]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.920392]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.920397]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.920399] ---[ end trace efdbe4ce60fe98ff ]---
>[  132.921344] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.921968] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.922580] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.923501] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.924410] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.925400] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.926398] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.927306] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.928214] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.929129] ------------[ cut here ]------------
>[  132.929151] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.929152] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.929193]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.929230] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.929234] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.929269] Workqueue: events i915_hotplug_work_func [i915]
>[  132.929282]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.929289]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.929292]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.929296] Call Trace:
>[  132.929300]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.929305]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.929317]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.929338]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.929362]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.929382]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.929402]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.929419]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.929423]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.929426]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.929429]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.929433]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.929437]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.929441]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.929445]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.929447] ---[ end trace efdbe4ce60fe9900 ]---
>[  132.930406] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.931162] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.931771] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.932682] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.933592] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.934496] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.935412] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.936323] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.937228] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.938139] ------------[ cut here ]------------
>[  132.938160] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.938161] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.938200]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.938234] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.938236] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.938251] Workqueue: events i915_hotplug_work_func [i915]
>[  132.938253]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.938257]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.938260]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.938264] Call Trace:
>[  132.938268]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.938272]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.938276]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.938297]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.938317]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.938337]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.938357]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.938374]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.938377]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.938381]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.938384]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.938388]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.938392]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.938396]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.938400]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.938402] ---[ end trace efdbe4ce60fe9901 ]---
>[  132.939343] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.939965] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.940577] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.941491] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  132.942394] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.943298] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.944213] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.945126] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.946047] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.946953] ------------[ cut here ]------------
>[  132.946973] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  132.946975] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  132.947011]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  132.947043] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  132.947045] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  132.947060] Workqueue: events i915_hotplug_work_func [i915]
>[  132.947062]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  132.947065]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  132.947069]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  132.947072] Call Trace:
>[  132.947076]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  132.947080]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  132.947084]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  132.947104]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  132.947123]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  132.947143]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  132.947161]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  132.947178]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  132.947181]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  132.947185]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  132.947188]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  132.947192]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  132.947195]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.947199]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  132.947203]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  132.947205] ---[ end trace efdbe4ce60fe9902 ]---
>[  132.948144] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.948770] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.949529] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.949837] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  132.957456] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  132.957739] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  132.992134] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  132.992455] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  132.993395] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.994016] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  132.994630] [drm:intel_dp_start_link_train] clock recovery OK
>[  132.995537] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  132.996438] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.997345] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.998256] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  132.999160] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.000061] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.000964] ------------[ cut here ]------------
>[  133.000985] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.000986] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.001019]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.001048] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.001049] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.001064] Workqueue: events i915_hotplug_work_func [i915]
>[  133.001066]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.001069]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.001072]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.001075] Call Trace:
>[  133.001079]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.001082]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.001085]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.001103]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.001121]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.001138]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.001155]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.001169]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.001172]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.001175]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.001178]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.001181]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.001185]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.001188]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.001191]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.001193] ---[ end trace efdbe4ce60fe9903 ]---
>[  133.002148] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.002769] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.003379] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.004295] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.005202] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.006107] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.007007] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.007901] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.008796] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.009714] ------------[ cut here ]------------
>[  133.009727] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.009728] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.009751]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.009772] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.009773] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.009783] Workqueue: events i915_hotplug_work_func [i915]
>[  133.009784]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.009786]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.009788]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.009791] Call Trace:
>[  133.009794]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.009796]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.009798]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.009811]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.009824]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.009836]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.009847]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.009858]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.009860]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.009862]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.009864]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.009867]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.009869]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.009871]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.009874]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.009875] ---[ end trace efdbe4ce60fe9904 ]---
>[  133.010806] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.011422] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.012026] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.013064] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.013975] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.014866] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.015770] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.016667] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.017570] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.018468] ------------[ cut here ]------------
>[  133.018481] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.018481] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.018504]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.018525] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.018526] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.018536] Workqueue: events i915_hotplug_work_func [i915]
>[  133.018537]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.018539]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.018541]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.018543] Call Trace:
>[  133.018546]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.018548]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.018550]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.018563]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.018575]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.018587]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.018599]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.018610]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.018612]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.018614]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.018616]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.018618]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.018620]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.018623]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.018625]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.018626] ---[ end trace efdbe4ce60fe9905 ]---
>[  133.019557] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.020173] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.020778] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.021693] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.022589] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.023484] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.024384] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.025280] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.026329] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.027225] ------------[ cut here ]------------
>[  133.027238] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.027239] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.027261]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.027282] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.027283] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.027292] Workqueue: events i915_hotplug_work_func [i915]
>[  133.027293]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.027296]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.027298]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.027300] Call Trace:
>[  133.027302]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.027305]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.027307]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.027319]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.027331]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.027343]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.027354]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.027365]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.027367]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.027369]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.027371]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.027373]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.027376]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.027378]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.027380]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.027382] ---[ end trace efdbe4ce60fe9906 ]---
>[  133.028313] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.028927] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.029530] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.030437] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.031331] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.032228] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.033125] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.034027] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.034923] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.035821] ------------[ cut here ]------------
>[  133.035833] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.035834] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.035857]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.035877] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.035879] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.035888] Workqueue: events i915_hotplug_work_func [i915]
>[  133.035889]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.035891]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.035893]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.035895] Call Trace:
>[  133.035898]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.035901]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.035903]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.035915]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.035927]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.035939]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.035951]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.035961]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.035963]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.035965]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.035967]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.035969]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.035971]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.035974]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.035976]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.035977] ---[ end trace efdbe4ce60fe9907 ]---
>[  133.036909] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.037525] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.038131] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.039038] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.039932] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.040822] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.041744] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.042642] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.043544] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.044445] ------------[ cut here ]------------
>[  133.044457] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.044458] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.044481]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.044501] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.044502] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.044512] Workqueue: events i915_hotplug_work_func [i915]
>[  133.044513]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.044515]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.044517]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.044519] Call Trace:
>[  133.044522]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.044524]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.044527]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.044539]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.044551]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.044563]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.044575]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.044585]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.044587]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.044589]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.044591]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.044593]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.044596]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.044598]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.044600]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.044602] ---[ end trace efdbe4ce60fe9908 ]---
>[  133.045536] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.046155] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.046758] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.047072] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  133.053610] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  133.053770] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  133.053772] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  133.467497] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  133.467503] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 0
>[  133.467535] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  133.467538] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  133.467540] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  133.468090] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  133.468430] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  133.469380] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.470946] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.471591] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.472541] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.473475] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.474430] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.475369] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.476303] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.477241] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.478192] ------------[ cut here ]------------
>[  133.478281] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.478301] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.478400]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.478487] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.478492] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.478536] Workqueue: events i915_hotplug_work_func [i915]
>[  133.478541]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.478551]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.478560]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.478569] Call Trace:
>[  133.478585]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.478596]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.478606]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.478660]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.478712]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.478762]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.478811]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.478853]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.478863]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.478871]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.478879]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.478889]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.478899]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.478908]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.478918]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.478923] ---[ end trace efdbe4ce60fe9909 ]---
>[  133.479926] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.480581] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.481225] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.482166] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.483265] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.484200] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.485133] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.486062] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.487000] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.487933] ------------[ cut here ]------------
>[  133.487979] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.487982] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.488064]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.488139] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.488143] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.488177] Workqueue: events i915_hotplug_work_func [i915]
>[  133.488181]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.488189]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.488196]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.488204] Call Trace:
>[  133.488214]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.488223]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.488231]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.488276]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.488320]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.488363]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.488404]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.488440]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.488448]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.488455]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.488462]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.488470]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.488479]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.488487]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.488496]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.488501] ---[ end trace efdbe4ce60fe990a ]---
>[  133.489470] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.490117] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.490758] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.491697] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.492626] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.493554] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.494493] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.495421] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.496354] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.497279] ------------[ cut here ]------------
>[  133.497321] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.497324] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.497397]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.497463] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.497467] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.497498] Workqueue: events i915_hotplug_work_func [i915]
>[  133.497502]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.497509]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.497516]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.497523] Call Trace:
>[  133.497532]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.497540]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.497547]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.497587]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.497628]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.497667]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.497705]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.497738]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.497745]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.497751]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.497758]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.497765]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.497773]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.497780]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.497788]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.497792] ---[ end trace efdbe4ce60fe990b ]---
>[  133.498762] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.499406] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.500037] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.500977] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.501903] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.502862] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.503789] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.510233] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  133.510417] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  133.510710] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  133.510864] [drm:drm_dp_i2c_do_msg] native defer
>[  133.546860] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  133.547196] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  133.547369] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  133.547373] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  133.925305] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  133.925312] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 1
>[  133.925347] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  133.925351] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  133.925353] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  133.925885] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  133.926228] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  133.927221] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.928767] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.929408] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.930358] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.931305] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.932242] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.933185] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.934123] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.935064] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.936006] ------------[ cut here ]------------
>[  133.936092] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  133.936096] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  133.936191]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  133.936279] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  133.936284] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  133.936327] Workqueue: events i915_hotplug_work_func [i915]
>[  133.936333]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  133.936342]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  133.936351]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  133.936360] Call Trace:
>[  133.936377]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  133.936388]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  133.936398]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  133.936451]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  133.936503]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  133.936554]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  133.936603]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  133.936646]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  133.936656]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  133.936664]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  133.936672]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  133.936681]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  133.936691]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.936701]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  133.936711]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  133.936717] ---[ end trace efdbe4ce60fe990c ]---
>[  133.937696] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.938353] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  133.939091] [drm:intel_dp_start_link_train] clock recovery OK
>[  133.940031] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  133.940958] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.941897] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  133.942840] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  133.951033] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  133.951227] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  133.951524] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  133.951679] [drm:drm_dp_i2c_do_msg] native defer
>[  133.988065] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  133.988407] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  133.988582] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  133.988587] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  134.365840] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  134.365846] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 2
>[  134.365878] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  134.365881] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  134.365883] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  134.366403] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  134.366735] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  134.367693] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.369193] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.369809] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.370724] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  134.371629] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.372539] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.373460] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.379715] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  134.379878] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  134.380157] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  134.414397] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  134.414714] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  134.414869] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  134.414870] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  134.794169] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  134.794174] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 0
>[  134.794203] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  134.794206] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  134.794208] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  134.794722] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  134.795055] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  134.796000] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.797508] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.798127] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.799049] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  134.799959] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.800886] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.801806] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.802724] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.803641] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.804558] ------------[ cut here ]------------
>[  134.804614] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  134.804617] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  134.804668]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  134.804715] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  134.804718] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  134.804742] Workqueue: events i915_hotplug_work_func [i915]
>[  134.804745]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  134.804750]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  134.804755]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  134.804760] Call Trace:
>[  134.804769]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  134.804776]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  134.804781]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  134.804810]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  134.804838]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  134.804865]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  134.804890]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  134.804913]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  134.804918]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  134.804923]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  134.804927]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  134.804932]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  134.804938]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.804943]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  134.804948]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.804951] ---[ end trace efdbe4ce60fe990d ]---
>[  134.805901] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.806531] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.807153] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.808073] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  134.808989] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.809888] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.810788] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.811686] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.812596] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.813496] ------------[ cut here ]------------
>[  134.813512] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  134.813513] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  134.813541]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  134.813567] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  134.813568] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  134.813580] Workqueue: events i915_hotplug_work_func [i915]
>[  134.813581]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  134.813584]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  134.813587]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  134.813589] Call Trace:
>[  134.813593]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  134.813596]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  134.813599]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  134.813614]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  134.813629]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  134.813644]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  134.813658]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  134.813671]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  134.813674]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  134.813676]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  134.813679]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  134.813681]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  134.813684]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.813687]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  134.813690]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.813692] ---[ end trace efdbe4ce60fe990e ]---
>[  134.814625] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.815240] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.815847] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.816727] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  134.817633] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.818526] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.819439] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.820313] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.821160] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.822069] ------------[ cut here ]------------
>[  134.822085] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  134.822086] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  134.822112]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  134.822137] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  134.822138] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  134.822150] Workqueue: events i915_hotplug_work_func [i915]
>[  134.822151]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  134.822153]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  134.822156]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  134.822159] Call Trace:
>[  134.822162]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  134.822165]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  134.822168]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  134.822182]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  134.822197]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  134.822211]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  134.822226]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  134.822238]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  134.822240]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  134.822242]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  134.822243]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  134.822245]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  134.822248]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.822250]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  134.822252]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.822253] ---[ end trace efdbe4ce60fe990f ]---
>[  134.823189] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.823805] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.824419] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.825328] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  134.826223] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.827119] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.828022] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.828935] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.829834] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.830731] ------------[ cut here ]------------
>[  134.830746] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  134.830747] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  134.830774]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  134.830799] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  134.830800] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  134.830811] Workqueue: events i915_hotplug_work_func [i915]
>[  134.830813]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  134.830815]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  134.830818]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  134.830821] Call Trace:
>[  134.830824]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  134.830827]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  134.830830]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  134.830845]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  134.830859]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  134.830873]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  134.830887]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  134.830900]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  134.830902]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  134.830905]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  134.830907]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  134.830910]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  134.830913]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.830915]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  134.830918]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.830920] ---[ end trace efdbe4ce60fe9910 ]---
>[  134.831853] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.832512] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.833115] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.834026] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  134.834918] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.835809] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.836745] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.837639] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.838542] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.839441] ------------[ cut here ]------------
>[  134.839454] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  134.839455] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  134.839478]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  134.839498] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  134.839499] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  134.839509] Workqueue: events i915_hotplug_work_func [i915]
>[  134.839510]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  134.839512]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  134.839514]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  134.839516] Call Trace:
>[  134.839519]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  134.839522]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  134.839524]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  134.839536]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  134.839548]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  134.839560]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  134.839572]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  134.839582]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  134.839585]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  134.839587]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  134.839589]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  134.839591]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  134.839593]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.839596]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  134.839598]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.839599] ---[ end trace efdbe4ce60fe9911 ]---
>[  134.840532] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.841149] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.841752] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.842659] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  134.843556] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.844452] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.845351] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.846246] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.847150] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.848046] ------------[ cut here ]------------
>[  134.848059] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  134.848060] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  134.848082]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  134.848103] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  134.848104] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  134.848113] Workqueue: events i915_hotplug_work_func [i915]
>[  134.848115]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  134.848117]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  134.848119]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  134.848121] Call Trace:
>[  134.848124]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  134.848126]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  134.848128]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  134.848141]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  134.848153]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  134.848165]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  134.848177]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  134.848187]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  134.848189]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  134.848191]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  134.848193]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  134.848195]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  134.848198]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.848200]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  134.848202]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  134.848204] ---[ end trace efdbe4ce60fe9912 ]---
>[  134.849153] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.849768] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.850371] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.850683] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  134.856671] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  134.856948] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  134.891172] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  134.891488] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  134.892418] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.893040] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  134.893659] [drm:intel_dp_start_link_train] clock recovery OK
>[  134.894578] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.895482] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  134.896388] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  134.904603] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  134.904770] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  134.904934] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  134.904936] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  135.319446] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  135.319457] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 1
>[  135.319508] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  135.319513] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  135.319516] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  135.320096] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  135.320463] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  135.321442] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.322982] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.323619] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.324561] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.325499] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.326439] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.327372] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.328304] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.329242] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.330179] ------------[ cut here ]------------
>[  135.330258] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.330262] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.330345]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.330423] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.330427] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.330467] Workqueue: events i915_hotplug_work_func [i915]
>[  135.330472]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.330480]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.330487]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.330495] Call Trace:
>[  135.330509]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.330519]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.330528]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.330575]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.330622]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.330666]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.330710]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.330748]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.330757]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.330764]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.330772]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.330780]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.330789]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.330797]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.330806]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.330811] ---[ end trace efdbe4ce60fe9913 ]---
>[  135.331780] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.332427] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.333073] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.334105] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.335035] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.335958] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.336897] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.337944] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.338868] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.339795] ------------[ cut here ]------------
>[  135.339837] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.339840] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.339914]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.339980] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.339984] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.340015] Workqueue: events i915_hotplug_work_func [i915]
>[  135.340018]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.340025]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.340032]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.340039] Call Trace:
>[  135.340048]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.340056]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.340063]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.340104]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.340144]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.340183]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.340221]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.340254]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.340261]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.340268]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.340274]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.340282]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.340289]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.340296]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.340304]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.340308] ---[ end trace efdbe4ce60fe9914 ]---
>[  135.341272] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.341914] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.342546] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.343480] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.344401] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.345325] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.346292] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.347216] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.348143] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.349063] ------------[ cut here ]------------
>[  135.349100] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.349103] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.349170]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.349230] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.349233] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.349262] Workqueue: events i915_hotplug_work_func [i915]
>[  135.349265]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.349271]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.349277]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.349283] Call Trace:
>[  135.349291]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.349298]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.349305]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.349341]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.349400]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.349451]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.349493]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.349524]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.349536]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.349544]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.349551]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.349557]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.349565]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.349571]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.349578]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.349582] ---[ end trace efdbe4ce60fe9915 ]---
>[  135.350564] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.351234] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.351871] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.352801] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.353726] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.354643] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.355569] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.356492] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.357427] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.358343] ------------[ cut here ]------------
>[  135.358377] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.358380] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.358440]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.358494] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.358497] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.358522] Workqueue: events i915_hotplug_work_func [i915]
>[  135.358525]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.358531]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.358536]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.358542] Call Trace:
>[  135.358549]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.358555]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.358562]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.358594]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.358627]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.358658]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.358689]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.358716]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.358722]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.358727]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.358732]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.358739]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.358745]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.358751]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.358757]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.358761] ---[ end trace efdbe4ce60fe9916 ]---
>[  135.359718] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.360353] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.360979] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.361925] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.362845] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.363759] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.364689] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.365614] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.366534] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.367452] ------------[ cut here ]------------
>[  135.367485] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.367487] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.367547]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.367602] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.367605] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.367629] Workqueue: events i915_hotplug_work_func [i915]
>[  135.367632]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.367638]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.367643]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.367649] Call Trace:
>[  135.367656]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.367663]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.367669]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.367702]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.367735]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.367766]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.367797]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.367824]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.367830]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.367835]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.367841]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.367847]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.367854]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.367859]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.367866]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.367869] ---[ end trace efdbe4ce60fe9917 ]---
>[  135.368825] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.369503] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.370215] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.371136] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.372324] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.373332] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.374285] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.375210] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.376136] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.377069] ------------[ cut here ]------------
>[  135.377118] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.377121] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.377186]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.377248] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.377252] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.377285] Workqueue: events i915_hotplug_work_func [i915]
>[  135.377288]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.377295]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.377301]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.377307] Call Trace:
>[  135.377318]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.377326]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.377332]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.377373]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.377411]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.377467]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.377504]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.377537]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.377545]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.377551]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.377557]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.377564]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.377573]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.377579]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.377586]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.377590] ---[ end trace efdbe4ce60fe9918 ]---
>[  135.378651] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.379291] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.379925] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.380252] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  135.385593] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  135.385879] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  135.420469] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  135.420793] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  135.421737] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.422355] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.422971] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.423897] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.424803] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.425989] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.426897] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.427897] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.428804] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.429718] ------------[ cut here ]------------
>[  135.429767] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.429769] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.429808]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.429846] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.429849] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.429880] Workqueue: events i915_hotplug_work_func [i915]
>[  135.429883]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.429886]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.429889]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.429893] Call Trace:
>[  135.429900]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.429906]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.429910]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.429945]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.429973]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.429999]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.430022]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.430042]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.430047]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.430050]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.430053]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.430057]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.430061]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.430066]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.430070]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.430073] ---[ end trace efdbe4ce60fe9919 ]---
>[  135.431023] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.431652] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.432264] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.433181] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.434132] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.435031] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.436021] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.436928] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.437848] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.438751] ------------[ cut here ]------------
>[  135.438779] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.438781] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.438810]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.438835] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.438837] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.438853] Workqueue: events i915_hotplug_work_func [i915]
>[  135.438854]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.438857]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.438860]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.438862] Call Trace:
>[  135.438868]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.438872]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.438875]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.438892]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.438910]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.438925]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.438939]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.438952]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.438956]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.438958]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.438961]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.438964]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.438967]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.438969]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.438972]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.438974] ---[ end trace efdbe4ce60fe991a ]---
>[  135.439910] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.440524] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.441130] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.442050] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.442953] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.443850] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.444751] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.445654] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.446703] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.447605] ------------[ cut here ]------------
>[  135.447622] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.447623] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.447647]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.447669] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.447670] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.447681] Workqueue: events i915_hotplug_work_func [i915]
>[  135.447682]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.447685]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.447687]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.447689] Call Trace:
>[  135.447693]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.447696]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.447698]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.447711]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.447724]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.447737]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.447749]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.447760]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.447762]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.447764]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.447766]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.447769]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.447771]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.447774]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.447776]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.447777] ---[ end trace efdbe4ce60fe991b ]---
>[  135.448709] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.449473] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.450082] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.450987] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.451885] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.452913] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.453839] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.454741] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.455646] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.456547] ------------[ cut here ]------------
>[  135.456570] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.456572] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.456598]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.456623] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.456624] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.456638] Workqueue: events i915_hotplug_work_func [i915]
>[  135.456640]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.456643]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.456645]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.456648] Call Trace:
>[  135.456652]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.456656]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.456658]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.456675]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.456690]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.456706]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.456720]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.456733]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.456736]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.456738]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.456741]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.456743]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.456746]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.456749]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.456752]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.456754] ---[ end trace efdbe4ce60fe991c ]---
>[  135.457699] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.458313] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.458924] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.459833] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.460740] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.461643] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.462549] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.463447] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.464355] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.465259] ------------[ cut here ]------------
>[  135.465306] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.465307] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.465337]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.465366] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.465368] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.465392] Workqueue: events i915_hotplug_work_func [i915]
>[  135.465394]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.465396]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.465398]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.465401] Call Trace:
>[  135.465407]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.465411]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.465413]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.465445]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.465472]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.465494]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.465513]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.465528]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.465533]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.465549]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.465557]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.465561]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.465568]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.465577]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.465585]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.465587] ---[ end trace efdbe4ce60fe991d ]---
>[  135.466543] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.467138] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.467742] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.468646] [drm:intel_dp_set_signal_levels] Using signal levels 02000000
>[  135.469542] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.470450] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.471351] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.472247] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.473144] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.474044] ------------[ cut here ]------------
>[  135.474072] WARNING: CPU: 2 PID: 27 at /home/czikus/Code/linux/linux-3.16.0/drivers/gpu/drm/i915/intel_dp.c:3122 intel_dp_link_down+0x1a9/0x230 [i915]()
>[  135.474073] Modules linked in: cdc_ether(E) usbnet(E) r8152(E) mii(E) hidp(E) pci_stub(E) vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) autofs4(E) arc4(E) uvcvideo(E) videobuf2_vmalloc(E) videobuf2_memops(E) videobuf2_core(E) v4l2_common(E) videodev(E) media(E) btusb(E) asus_nb_wmi(E) asus_wmi(E) sparse_keymap(E) rfcomm(E) bnep(E) bluetooth(E) 6lowpan_iphc(E) intel_rapl(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) crct10dif_pclmul(E) crc32_pclmul(E) ghash_clmulni_intel(E) dm_multipath(E) aesni_intel(E) scsi_dh(E) iwlmvm(E) aes_x86_64(E) lrw(E) gf128mul(E) mac80211(E) glue_helper(E) ablk_helper(E) cryptd(E) iwlwifi(E) joydev(E) snd_hda_codec_hdmi(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) serio_raw(E) cfg80211(E) mei_me(E) binfmt_misc(E) mei(E) lpc_ich(E)
>[  135.474099]  shpchp(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) snd_hwdep(E) snd_seq_midi(E) snd_seq_midi_event(E) snd_rawmidi(E) snd_soc_rt5640(E) snd_soc_rl6231(E) snd_soc_core(E) snd_compress(E) snd_pcm_dmaengine(E) snd_seq(E) i2c_hid(E) snd_pcm(E) snd_seq_device(E) snd_timer(E) snd(E) dw_dmac(E) i2c_designware_platform(E) dw_dmac_core(E) snd_soc_sst_acpi(E) i2c_designware_core(E) 8250_dw(E) spi_pxa2xx_platform(E) intel_smartconnect(E) soundcore(E) mac_hid(E) parport_pc(E) ppdev(E) lp(E) parport(E) nls_iso8859_1(E) dm_mirror(E) dm_region_hash(E) dm_log(E) hid_generic(E) usbhid(E) hid(E) psmouse(E) i915(E) ahci(E) i2c_algo_bit(E) libahci(E) drm_kms_helper(E) drm(E) wmi(E) video(E) sdhci_acpi(E) sdhci(E)
>[  135.474124] CPU: 2 PID: 27 Comm: kworker/2:0 Tainted: G        W  OE 3.16.0-24-generic #32-Ubuntu
>[  135.474125] Hardware name: ASUSTeK COMPUTER INC. UX301LAA/UX301LAA, BIOS UX301LAA.206 12/31/2013
>[  135.474141] Workqueue: events i915_hotplug_work_func [i915]
>[  135.474142]  0000000000000009 ffff880213163c88 ffffffff8277fcbc 0000000000000000
>[  135.474144]  ffff880213163cc0 ffffffff8206fd8d ffff880035fb0000 0000000083000006
>[  135.474147]  ffff88020fca6800 0000000000000001 ffff88020fca78d8 ffff880213163cd0
>[  135.474149] Call Trace:
>[  135.474154]  [<ffffffff8277fcbc>] dump_stack+0x45/0x56
>[  135.474157]  [<ffffffff8206fd8d>] warn_slowpath_common+0x7d/0xa0
>[  135.474159]  [<ffffffff8206fe6a>] warn_slowpath_null+0x1a/0x20
>[  135.474176]  [<ffffffffc03e82a9>] intel_dp_link_down+0x1a9/0x230 [i915]
>[  135.474192]  [<ffffffffc03ed745>] intel_dp_complete_link_train+0x105/0x390 [i915]
>[  135.474206]  [<ffffffffc03edff0>] intel_dp_check_link_status+0xc0/0x1b0 [i915]
>[  135.474219]  [<ffffffffc03e4cd8>] intel_ddi_hot_plug+0x28/0x30 [i915]
>[  135.474231]  [<ffffffffc03aaf94>] i915_hotplug_work_func+0x1f4/0x340 [i915]
>[  135.474234]  [<ffffffff8208d8e2>] process_one_work+0x182/0x4e0
>[  135.474236]  [<ffffffff8208dcab>] worker_thread+0x6b/0x6a0
>[  135.474238]  [<ffffffff8208dc40>] ? process_one_work+0x4e0/0x4e0
>[  135.474240]  [<ffffffff82094aeb>] kthread+0xdb/0x100
>[  135.474243]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.474245]  [<ffffffff82787c3c>] ret_from_fork+0x7c/0xb0
>[  135.474248]  [<ffffffff82094a10>] ? kthread_create_on_node+0x1c0/0x1c0
>[  135.474249] ---[ end trace efdbe4ce60fe991e ]---
>[  135.475182] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.475797] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.476400] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.476842] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting
>[  135.481778] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  135.481937] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  135.481938] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[  135.896100] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00200000
>[  135.896103] [drm:intel_hpd_irq_handler] Received HPD interrupt on PIN 4 - cnt: 0
>[  135.896116] [drm:i915_hotplug_work_func] running encoder hotplug functions
>[  135.896118] [drm:i915_hotplug_work_func] Connector DP-1 (pin 4) received hotplug event.
>[  135.896119] [drm:i915_hotplug_work_func] Connector HDMI-A-1 (pin 4) received hotplug event.
>[  135.896609] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  135.896928] [drm:intel_dp_check_link_status] TMDS-21: channel EQ not ok, retraining
>[  135.897870] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.899349] [drm:intel_dp_set_signal_levels] Using signal levels 03000000
>[  135.899964] [drm:intel_dp_start_link_train] clock recovery OK
>[  135.900879] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.901773] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[  135.902679] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
>[  135.910315] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[  135.910481] [drm:intel_dp_detect] [CONNECTOR:22:DP-1]
>[  135.910760] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  135.945034] [drm:intel_dp_get_dpcd] DPCD: 11 0a 84 00 00 00 00 00 00 00 00 00 00 00 00
>[  135.945352] [drm:intel_hdmi_detect] [CONNECTOR:23:HDMI-A-1]
>[  135.945507] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[  135.945508] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb

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