Created attachment 122176 [details]
/sys/class/drm/card0/error

$ uname --all
Linux xxxxxx 4.4.0-11-generic #26-Ubuntu SMP Sat Mar 5 14:25:21 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux


dmesg output:

[   54.807177] [drm] GPU HANG: ecode 9:0:0x86dffff9, in compiz [1365], reason: Ring hung, action: reset
[   54.807179] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
[   54.807180] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
[   54.807181] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
[   54.807182] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
[   54.807183] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[   54.807231] ------------[ cut here ]------------
[   54.807271] WARNING: CPU: 2 PID: 19 at /build/linux-H9bHY_/linux-4.4.0/ubuntu/i915/intel_display.c:11435 intel_mmio_flip_work_func+0x45e/0x490 [i915_bpo]()
[   54.807274] WARN_ON(__i915_wait_request(mmio_flip->req, mmio_flip->crtc->reset_counter, false, ((void *)0), &mmio_flip->i915->rps.mmioflips))
[   54.807276] Modules linked in:
[   54.807278]  rfcomm btusb btrtl uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media nvram msr hid_multitouch snd_hda_codec_hdmi dell_led bnep snd_hda_codec_realtek snd_hda_codec_generic i2c_designware_platform i2c_designware_core dell_wmi sparse_keymap dell_laptop dcdbas snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_core nls_iso8859_1 brcmfmac intel_rapl x86_pkg_temp_thermal snd_compress intel_powerclamp coretemp ac97_bus snd_pcm_dmaengine dw_dmac_core kvm_intel brcmutil kvm cfg80211 irqbypass crct10dif_pclmul crc32_pclmul rtsx_pci_ms memstick aesni_intel aes_x86_64 snd_hda_intel lrw gf128mul snd_hda_codec glue_helper ablk_helper snd_hda_core cryptd snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi
[   54.807328]  input_leds snd_seq snd_seq_device snd_timer joydev serio_raw snd idma64 virt_dma soundcore mei_me mei shpchp intel_lpss_pci hci_uart btbcm btqca btintel bluetooth int3403_thermal processor_thermal_device intel_lpss_acpi intel_lpss int3400_thermal acpi_thermal_rel mac_hid int340x_thermal_zone acpi_pad intel_soc_dts_iosf acpi_als kfifo_buf industrialio parport_pc ppdev lp parport autofs4 usbhid rtsx_pci_sdmmc i915_bpo intel_ips i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect sysimgblt fb_sys_fops nvme drm rtsx_pci wmi i2c_hid hid pinctrl_sunrisepoint video pinctrl_intel fjes
[   54.807369] CPU: 2 PID: 19 Comm: kworker/2:0 Not tainted 4.4.0-11-generic #26-Ubuntu
[   54.807370] Hardware name: Dell Inc. XPS 13 9350/09JHRY, BIOS 1.2.3 01/08/2016
[   54.807401] Workqueue: events intel_mmio_flip_work_func [i915_bpo]
[   54.807403]  0000000000000286 000000000a26699e ffff88046e30fd20 ffffffff813e1ec3
[   54.807407]  ffff88046e30fd68 ffffffffc0270450 ffff88046e30fd58 ffffffff8107fe12
[   54.807411]  ffff88046e60a3c0 ffff880410436600 ffff880467ffa400 0000000000000080
[   54.807414] Call Trace:
[   54.807420]  [<ffffffff813e1ec3>] dump_stack+0x63/0x90
[   54.807424]  [<ffffffff8107fe12>] warn_slowpath_common+0x82/0xc0
[   54.807426]  [<ffffffff8107feac>] warn_slowpath_fmt+0x5c/0x80
[   54.807429]  [<ffffffff810168b0>] ? __switch_to+0x420/0x5a0
[   54.807451]  [<ffffffffc01fb8ee>] intel_mmio_flip_work_func+0x45e/0x490 [i915_bpo]
[   54.807455]  [<ffffffff81098eb2>] process_one_work+0x162/0x480
[   54.807457]  [<ffffffff8109921b>] worker_thread+0x4b/0x4c0
[   54.807460]  [<ffffffff810991d0>] ? process_one_work+0x480/0x480
[   54.807462]  [<ffffffff8109f3e8>] kthread+0xd8/0xf0
[   54.807464]  [<ffffffff8109f310>] ? kthread_create_on_node+0x1e0/0x1e0
[   54.807468]  [<ffffffff8181cbcf>] ret_from_fork+0x3f/0x70
[   54.807470]  [<ffffffff8109f310>] ? kthread_create_on_node+0x1e0/0x1e0
[   54.807472] ---[ end trace 95e619996150cb00 ]---
[   54.809601] drm/i915: Resetting chip after gpu hang
[   56.807123] [drm] RC6 on