Attachment 103375 Details for Bug 81200 – dmesg

dmesg

dmesg_byt02_pm_rpm_0724.txt (text/plain), 24.44 KB, created by lu hua on 2014-07-24 05:42:05 UTC

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Creator: lu hua

Created: 2014-07-24 05:42:05 UTC

Size: 24.44 KB

patch

obsolete

>[  964.909471] console [netcon0] enabled
>[  964.912682] netconsole: network logging started
>[  964.965513] console [netcon0] disabled
>[  965.054509] console [netcon0] enabled
>[  965.057637] netconsole: network logging started
>[ 1039.767963] [drm:i915_gem_open] 
>[ 1039.771235] [drm:intel_crtc_set_config] [CRTC:7] [FB:34] #connectors=1 (x y) (0 0)
>[ 1039.774302] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:7], mode_changed=1, fb_changed=0
>[ 1039.777512] [drm:intel_modeset_stage_output_state] [CONNECTOR:27:eDP-1] to [CRTC:7]
>[ 1039.780651] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
>[ 1039.783746] [drm:connected_sink_compute_bpp] [CONNECTOR:27:eDP-1] checking for sink bpp constrains
>[ 1039.786760] [drm:connected_sink_compute_bpp] clamping display bpp (was 24) to EDID reported max of 18
>[ 1039.789882] [drm:intel_dp_compute_config] DP link computation with max lane count 1 max bw 0a pixel clock 71000KHz
>[ 1039.792985] [drm:intel_dp_compute_config] using min 1 lanes per VBT
>[ 1039.796036] [drm:intel_dp_compute_config] using min 06 link bw per VBT
>[ 1039.799054] [drm:intel_dp_compute_config] DP link bw 06 lane count 1 clock 162000 bpp 18
>[ 1039.802087] [drm:intel_dp_compute_config] DP link bw required 127800 available 129600
>[ 1039.805110] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
>[ 1039.808122] [drm:intel_dump_pipe_config] [CRTC:7][modeset] config for pipe A
>[ 1039.811129] [drm:intel_dump_pipe_config] cpu_transcoder: A
>[ 1039.814056] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
>[ 1039.816965] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
>[ 1039.819973] [drm:intel_dump_pipe_config] dp: 1, gmch_m: 2068024, gmch_n: 2097152, link_m: 114890, link_n: 262144, tu: 64
>[ 1039.823035] [drm:intel_dump_pipe_config] requested mode:
>[ 1039.826057] [drm:drm_mode_debug_printmodeline] Modeline 0:"1366x768" 60 71000 1366 1404 1426 1482 768 771 777 798 0x48 0xa
>[ 1039.829149] [drm:intel_dump_pipe_config] adjusted mode:
>[ 1039.832147] [drm:drm_mode_debug_printmodeline] Modeline 0:"1366x768" 60 71000 1366 1404 1426 1482 768 771 777 798 0x48 0xa
>[ 1039.835338] [drm:intel_dump_crtc_timings] crtc timings: 71000 1366 1404 1426 1482 768 771 777 798, type: 0x48 flags: 0xa
>[ 1039.838640] [drm:intel_dump_pipe_config] port clock: 162000
>[ 1039.841963] [drm:intel_dump_pipe_config] pipe src size: 1366x768
>[ 1039.845322] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
>[ 1039.848791] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
>[ 1039.852317] [drm:intel_dump_pipe_config] ips: 0
>[ 1039.855796] [drm:intel_dump_pipe_config] double wide: 0
>[ 1039.859702] [drm:i9xx_update_primary_plane] Writing base 00475000 00000000 0 0 5504
>[ 1039.863985] [drm:intel_dp_init_panel_power_sequencer] cur t1_t3 2000 t8 1 t9 1 t10 500 t11_t12 6000
>[ 1039.867646] [drm:intel_dp_init_panel_power_sequencer] vbt t1_t3 2000 t8 10 t9 2000 t10 500 t11_t12 5000
>[ 1039.871316] [drm:intel_dp_init_panel_power_sequencer] panel power up delay 200, power down delay 50, power cycle delay 600
>[ 1039.875047] [drm:intel_dp_init_panel_power_sequencer] backlight on delay 1, off delay 200
>[ 1039.878770] [drm:intel_dp_init_panel_power_sequencer_registers] panel power sequencer register settings: PP_ON 0x87d00001, PP_OFF 0x1f40001, PP_DIV 0x270f06
>[ 1039.882754] [drm:_edp_panel_vdd_on] Turning eDP VDD on
>[ 1039.886623] [drm:wait_panel_power_cycle] Wait for panel power cycle
>[ 1039.890519] [drm:wait_panel_status] mask b800000f value 00000000 status 00000000 control abcd0000
>[ 1039.894453] [drm:wait_panel_status] Wait complete
>[ 1039.898316] [drm:_edp_panel_vdd_on] PP_STATUS: 0x00000000 PP_CONTROL: 0xabcd0008
>[ 1039.902250] [drm:_edp_panel_vdd_on] eDP was not running
>[ 1039.992320] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00100000, dig 0x00000000
>[ 1039.996375] [drm:intel_hpd_irq_handler] digital hpd port 2 0
>[ 1040.000406] [drm:intel_dp_hpd_pulse] got hpd irq on port 2 - short
>[ 1040.005049] [drm:intel_dp_get_dpcd] DPCD: 11 0a 81 41 00 00 01 80 02 00 00 00 0f 07 00
>[ 1040.009726] [drm:intel_dp_check_link_status] TMDS-26: channel EQ not ok, retraining
>[ 1040.023788] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[ 1040.028498] [drm:intel_dp_start_link_train] clock recovery OK
>[ 1040.033437] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[ 1040.107859] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
>[ 1040.112496] [drm:intel_dp_start_link_train] clock recovery OK
>[ 1040.116528] [drm:intel_edp_panel_on] Turn eDP power on
>[ 1040.120508] [drm:wait_panel_power_cycle] Wait for panel power cycle
>[ 1040.124462] [drm:wait_panel_status] mask b800000f value 00000000 status 00000000 control abcd0008
>[ 1040.128473] [drm:wait_panel_status] Wait complete
>[ 1040.132375] [drm:wait_panel_on] Wait for panel power on
>[ 1040.136232] [drm:wait_panel_status] mask b000000f value 80000008 status 9000000a control abcd000b
>[ 1040.283029] [drm:wait_panel_status] Wait complete
>[ 1040.286971] [drm:edp_panel_vdd_off_sync] Turning eDP VDD off
>[ 1040.290934] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd0003
>[ 1040.295157] [drm:_edp_panel_vdd_on] Turning eDP VDD on
>[ 1040.299105] [drm:_edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL: 0xabcd000b
>[ 1040.304016] [drm:intel_dp_complete_link_train] Channel EQ done. DP Training successful
>[ 1040.308503] [drm:g4x_check_srwm] SR watermark: display plane 56, cursor 2
>[ 1040.312550] [drm:g4x_check_srwm] SR watermark: display plane 109, cursor 2
>[ 1040.316512] [drm:valleyview_update_wm] Setting FIFO watermarks - A: plane=109, cursor=2, B: plane=2, cursor=2, SR: plane=56, cursor=2
>[ 1040.320585] [drm:intel_set_memory_cxsr] memory self-refresh is enabled
>[ 1040.324602] [drm:intel_edp_backlight_on] 
>[ 1040.328506] [drm:intel_panel_enable_backlight] pipe A
>[ 1040.332374] [drm:intel_panel_actually_set_backlight] set backlight PWM = 3906
>[ 1040.336266] [drm:intel_connector_check_state] [CONNECTOR:27:eDP-1]
>[ 1040.340043] [drm:check_encoder_state] [ENCODER:16:DAC-16]
>[ 1040.343818] [drm:check_encoder_state] [ENCODER:17:TMDS-17]
>[ 1040.347517] [drm:check_encoder_state] [ENCODER:22:TMDS-22]
>[ 1040.351140] [drm:check_encoder_state] [ENCODER:24:TMDS-24]
>[ 1040.354701] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[ 1040.358250] [drm:check_crtc_state] [CRTC:7]
>[ 1040.361783] [drm:check_crtc_state] [CRTC:12]
>[ 1040.365233] [drm:intel_crtc_set_config] [CRTC:12] [NOFB]
>[ 1040.368722] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=0, fb_changed=0
>[ 1040.372254] [drm:intel_modeset_stage_output_state] [CONNECTOR:27:eDP-1] to [CRTC:7]
>[ 1040.375947] [drm:i915_gem_open] 
>[ 1040.382375] [drm:i915_gem_open] 
>[ 1040.386030] [drm:i915_gem_open] 
>[ 1040.389557] [drm:drm_mode_getresources] CRTC[2] CONNECTORS[5] ENCODERS[5]
>[ 1040.393004] [drm:drm_mode_getresources] CRTC[2] CONNECTORS[5] ENCODERS[5]
>[ 1040.396230] [drm:drm_mode_getconnector] [CONNECTOR:27:?]
>[ 1040.399386] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:eDP-1]
>[ 1040.402753] [drm:intel_dp_detect] [CONNECTOR:27:eDP-1]
>[ 1040.406335] [drm:intel_dp_probe_oui] Sink OUI: 001cf8
>[ 1040.409748] [drm:intel_dp_probe_oui] Branch OUI: 000000
>[ 1040.413239] [drm:drm_edid_to_eld] ELD: no CEA Extension found
>[ 1040.416482] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:27:eDP-1] probed modes :
>[ 1040.419674] [drm:drm_mode_debug_printmodeline] Modeline 28:"1366x768" 60 71000 1366 1404 1426 1482 768 771 777 798 0x48 0xa
>[ 1040.423099] [drm:drm_mode_getconnector] [CONNECTOR:27:?]
>[ 1040.427000] [drm:drm_mode_getconnector] [CONNECTOR:15:?]
>[ 1040.430172] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:15:VGA-1]
>[ 1040.433437] [drm:intel_crt_detect] [CONNECTOR:15:VGA-1] force=1
>[ 1040.436694] [drm:valleyview_crt_detect_hotplug] trigger hotplug detect cycle: adpa=0xf40000
>[ 1040.446139] [drm:valleyview_crt_detect_hotplug] valleyview hotplug adpa=0xf40000, result 0
>[ 1040.449444] [drm:intel_crt_detect] CRT not detected via hotplug
>[ 1040.452943] [drm:gmbus_xfer] GMBUS [i915 gmbus vga] NAK for addr: 0050 r(1)
>[ 1040.456243] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus vga
>[ 1040.459643] [drm:intel_crt_get_edid] CRT GMBUS EDID read failed, retry using GPIO bit-banging
>[ 1040.463006] [drm:intel_gmbus_force_bit] enabling bit-banging on i915 gmbus vga. force bit now 1
>[ 1040.466798] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus vga
>[ 1040.470216] [drm:intel_gmbus_force_bit] disabling bit-banging on i915 gmbus vga. force bit now 0
>[ 1040.473718] [drm:intel_crt_detect_ddc] CRT not detected via DDC:0x50 [no valid EDID found]
>[ 1040.477207] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:15:VGA-1] disconnected
>[ 1040.480773] [drm:drm_mode_getconnector] [CONNECTOR:15:?]
>[ 1040.482109] [drm:valleyview_set_rps] GPU freq request from 646 MHz (214) to 167 MHz (191)
>[ 1040.487758] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:15:VGA-1]
>[ 1040.491335] [drm:intel_crt_detect] [CONNECTOR:15:VGA-1] force=1
>[ 1040.494913] [drm:valleyview_crt_detect_hotplug] trigger hotplug detect cycle: adpa=0xf40000
>[ 1040.504170] [drm:valleyview_crt_detect_hotplug] valleyview hotplug adpa=0xf40000, result 0
>[ 1040.507676] [drm:intel_crt_detect] CRT not detected via hotplug
>[ 1040.511454] [drm:gmbus_xfer] GMBUS [i915 gmbus vga] NAK for addr: 0050 r(1)
>[ 1040.515013] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus vga
>[ 1040.518633] [drm:intel_crt_get_edid] CRT GMBUS EDID read failed, retry using GPIO bit-banging
>[ 1040.522241] [drm:intel_gmbus_force_bit] enabling bit-banging on i915 gmbus vga. force bit now 1
>[ 1040.526347] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus vga
>[ 1040.530124] [drm:intel_gmbus_force_bit] disabling bit-banging on i915 gmbus vga. force bit now 0
>[ 1040.533989] [drm:intel_crt_detect_ddc] CRT not detected via DDC:0x50 [no valid EDID found]
>[ 1040.538062] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:15:VGA-1] disconnected
>[ 1040.542371] [drm:drm_mode_getconnector] [CONNECTOR:18:?]
>[ 1040.546395] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:18:HDMI-A-1]
>[ 1040.550556] [drm:intel_hdmi_detect] [CONNECTOR:18:HDMI-A-1]
>[ 1040.554998] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[ 1040.559077] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[ 1040.563275] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:18:HDMI-A-1] disconnected
>[ 1040.567462] [drm:drm_mode_getconnector] [CONNECTOR:18:?]
>[ 1040.571719] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:18:HDMI-A-1]
>[ 1040.576097] [drm:intel_hdmi_detect] [CONNECTOR:18:HDMI-A-1]
>[ 1040.580809] [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK for addr: 0050 r(1)
>[ 1040.585192] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
>[ 1040.589713] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:18:HDMI-A-1] disconnected
>[ 1040.594646] [drm:drm_mode_getconnector] [CONNECTOR:23:?]
>[ 1040.599078] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:23:DP-1]
>[ 1040.603728] [drm:intel_dp_detect] [CONNECTOR:23:DP-1]
>[ 1040.608360] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:23:DP-1] disconnected
>[ 1040.612936] [drm:drm_mode_getconnector] [CONNECTOR:23:?]
>[ 1040.617470] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:23:DP-1]
>[ 1040.622105] [drm:intel_dp_detect] [CONNECTOR:23:DP-1]
>[ 1040.626772] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:23:DP-1] disconnected
>[ 1040.631876] [drm:drm_mode_getconnector] [CONNECTOR:25:?]
>[ 1040.636457] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:25:HDMI-A-2]
>[ 1040.641151] [drm:intel_hdmi_detect] [CONNECTOR:25:HDMI-A-2]
>[ 1040.646262] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[ 1040.651037] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:25:HDMI-A-2] disconnected
>[ 1040.655746] [drm:drm_mode_getconnector] [CONNECTOR:25:?]
>[ 1040.660449] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:25:HDMI-A-2]
>[ 1040.665150] [drm:intel_hdmi_detect] [CONNECTOR:25:HDMI-A-2]
>[ 1040.670326] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
>[ 1040.675165] [drm:drm_helper_probe_single_connector_modes_merge_bits] [CONNECTOR:25:HDMI-A-2] disconnected
>[ 1040.683177] [drm:drm_mode_setcrtc] [CRTC:7]
>[ 1040.683285] [drm:intel_crtc_set_config] [CRTC:7] [NOFB]
>[ 1040.683546] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:7], mode_changed=1, fb_changed=0
>[ 1040.683593] [drm:intel_modeset_stage_output_state] [CONNECTOR:27:eDP-1] to [NOCRTC]
>[ 1040.683634] [drm:intel_modeset_stage_output_state] encoder changed, full mode switch
>[ 1040.683740] [drm:intel_modeset_stage_output_state] crtc changed, full mode switch
>[ 1040.683787] [drm:intel_modeset_stage_output_state] crtc disabled, full mode switch
>[ 1040.683851] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 0, prepare: 0, disable: 1
>[ 1040.684018] [drm:intel_set_memory_cxsr] memory self-refresh is disabled
>[ 1040.684339] [drm:intel_edp_backlight_off] 
>[ 1040.885378] [drm:intel_panel_actually_set_backlight] set backlight PWM = 0
>[ 1040.885961] [drm:intel_edp_panel_off] Turn eDP power off
>[ 1040.886021] [drm:wait_panel_off] Wait for panel power off time
>[ 1040.886078] [drm:wait_panel_status] mask b0000000 value 00000000 status e0000003 control abcd0000
>[ 1040.929755] [drm:wait_panel_status] Wait complete
>[ 1040.947263] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00100000, dig 0x00000000
>[ 1040.947315] [drm:intel_hpd_irq_handler] digital hpd port 2 0
>[ 1040.947626] [drm:intel_dp_hpd_pulse] got hpd irq on port 2 - short
>[ 1040.947784] [drm:_edp_panel_vdd_on] Turning eDP VDD on
>[ 1040.947843] [drm:wait_panel_power_cycle] Wait for panel power cycle
>[ 1040.959533] [drm:intel_dp_link_down] 
>[ 1041.010487] [drm:intel_set_memory_cxsr] memory self-refresh is disabled
>[ 1041.010564] [drm:valleyview_update_wm] Setting FIFO watermarks - A: plane=2, cursor=2, B: plane=2, cursor=2, SR: plane=0, cursor=0
>[ 1041.012481] [drm:vlv_update_cdclk] Current CD clock rate: 200000 kHz
>[ 1041.012745] [drm:check_encoder_state] [ENCODER:16:DAC-16]
>[ 1041.012837] [drm:check_encoder_state] [ENCODER:17:TMDS-17]
>[ 1041.012954] [drm:check_encoder_state] [ENCODER:22:TMDS-22]
>[ 1041.013007] [drm:check_encoder_state] [ENCODER:24:TMDS-24]
>[ 1041.013060] [drm:check_encoder_state] [ENCODER:26:TMDS-26]
>[ 1041.013176] [drm:check_crtc_state] [CRTC:7]
>[ 1041.013236] [drm:check_crtc_state] [CRTC:12]
>[ 1041.013446] [drm:drm_mode_setcrtc] [CRTC:12]
>[ 1041.013493] [drm:intel_crtc_set_config] [CRTC:12] [NOFB]
>[ 1041.013649] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:12], mode_changed=0, fb_changed=0
>[ 1041.486852] [drm:wait_panel_status] mask b800000f value 00000000 status 00000000 control abcd0000
>[ 1041.486932] [drm:wait_panel_status] Wait complete
>[ 1041.487003] [drm:_edp_panel_vdd_on] PP_STATUS: 0x00000000 PP_CONTROL: 0xabcd0008
>[ 1041.487060] [drm:_edp_panel_vdd_on] eDP was not running
>[ 1041.581029] [drm:intel_hpd_irq_handler] hotplug event received, stat 0x00100000, dig 0x00000000
>[ 1041.581092] [drm:intel_hpd_irq_handler] digital hpd port 2 0
>[ 1041.688725] [drm:intel_dp_get_dpcd] DPCD: 11 0a 81 41 00 00 01 80 02 00 00 00 0f 07 00
>[ 1041.689379] [drm:intel_dp_check_link_status] TMDS-26: channel EQ not ok, retraining
>[ 1041.689807] BUG: unable to handle kernel NULL pointer dereference at 0000000000000408
>[ 1041.694626] IP: [<ffffffffa00e5f4f>] intel_dp_set_signal_levels+0x496/0x822 [i915]
>[ 1041.699411] PGD 0 
>[ 1041.704057] Oops: 0000 [#1] SMP 
>[ 1041.708710] Modules linked in: netconsole configfs dm_mod snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support snd_hda_codec_conexant snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec pcspkr snd_hwdep snd_pcm nouveau snd_timer ttm snd lpc_ich i2c_i801 r8169 soundcore mfd_core iosf_mbi battery wmi ac acpi_cpufreq uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev i915 button video drm_kms_helper drm [last unloaded: netconsole]
>[ 1041.725412] CPU: 1 PID: 1188 Comm: kworker/u8:4 Tainted: G        W     3.16.0-rc6_drm-intel-nightly_af1aab_20140724_debug+ #766
>[ 1041.730540] Workqueue: i915-dp i915_digport_work_func [i915]
>[ 1041.735649] task: ffff88007388c1e0 ti: ffff880173fb4000 task.ti: ffff880173fb4000
>[ 1041.740740] RIP: 0010:[<ffffffffa00e5f4f>]  [<ffffffffa00e5f4f>] intel_dp_set_signal_levels+0x496/0x822 [i915]
>[ 1041.745990] RSP: 0018:ffff880173fb7bc8  EFLAGS: 00010246
>[ 1041.751099] RAX: 0000000000000000 RBX: ffff8801736c0000 RCX: 0000000000000001
>[ 1041.756220] RDX: 0000000000000000 RSI: ffff880173fb7c7c RDI: ffff880073ab10d8
>[ 1041.761288] RBP: ffff880173fb7c38 R08: 0000000000000000 R09: 0000000000000000
>[ 1041.766328] R10: 000000000000000d R11: 0000000000000000 R12: ffff880173fb7c7c
>[ 1041.771326] R13: ffff8801736c7f00 R14: ffff8801736c0000 R15: ffff880173fb7c7c
>[ 1041.776262] FS:  0000000000000000(0000) GS:ffff88017fc80000(0000) knlGS:0000000000000000
>[ 1041.781205] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>[ 1041.786102] CR2: 0000000000000408 CR3: 0000000002010000 CR4: 00000000001007e0
>[ 1041.790986] Stack:
>[ 1041.795805]  0000000000000007 ffff880073ab1118 ffff880173fb7be8 ffffffff81835bed
>[ 1041.800903]  ffff880173fb7c7c ffffffffa005961e ffff880173fb7c08 0000000800000107
>[ 1041.805960]  ffff880173fb7c7a ffff880073ab10d8 ffff880173fb7c7c ffff8801736c7f00
>[ 1041.810954] Call Trace:
>[ 1041.815679]  [<ffffffff81835bed>] ? mutex_unlock+0xe/0x10
>[ 1041.820417]  [<ffffffffa005961e>] ? drm_dp_dpcd_access+0x6d/0xe9 [drm_kms_helper]
>[ 1041.825215]  [<ffffffffa00e8523>] intel_dp_reset_link_train.constprop.16+0x21/0x36 [i915]
>[ 1041.830007]  [<ffffffffa00e9c05>] intel_dp_start_link_train+0xaf/0x1fc [i915]
>[ 1041.834732]  [<ffffffffa00ea796>] intel_dp_check_link_status+0x112/0x13e [i915]
>[ 1041.839400]  [<ffffffffa00ea8a8>] intel_dp_hpd_pulse+0xe6/0x13f [i915]
>[ 1041.844019]  [<ffffffffa00ac7fc>] i915_digport_work_func+0xe6/0xff [i915]
>[ 1041.848583]  [<ffffffff81056d72>] process_one_work+0x25a/0x442
>[ 1041.853081]  [<ffffffff81056cdf>] ? process_one_work+0x1c7/0x442
>[ 1041.857528]  [<ffffffff81057629>] worker_thread+0x2f8/0x400
>[ 1041.861930]  [<ffffffff81057331>] ? pool_mayday_timeout+0x12d/0x12d
>[ 1041.866299]  [<ffffffff8105cbf0>] kthread+0xed/0xf5
>[ 1041.870594]  [<ffffffff8105cb03>] ? __init_kthread_worker+0x5a/0x5a
>[ 1041.874858]  [<ffffffff8183796c>] ret_from_fork+0x7c/0xb0
>[ 1041.879070]  [<ffffffff8105cb03>] ? __init_kthread_worker+0x5a/0x5a
>[ 1041.883250] Code: ff 41 81 ff 00 08 00 00 75 bb e9 f6 fe ff ff 83 f8 02 74 0f 83 f8 03 74 06 ff c8 74 02 0f 0b 31 c9 eb 05 b9 01 00 00 00 44 88 f0 <44> 8b aa 08 04 00 00 83 e0 18 3c 08 0f 84 89 00 00 00 77 09 84 
>[ 1041.895186] RIP  [<ffffffffa00e5f4f>] intel_dp_set_signal_levels+0x496/0x822 [i915]
>[ 1041.899609]  RSP <ffff880173fb7bc8>
>[ 1041.903871] CR2: 0000000000000408
>[ 1041.908080] [drm:intel_backlight_device_update_status] updating intel_backlight, brightness=3906/3906
>[ 1041.932529] ---[ end trace c924f0de8a14a7d8 ]---
>[ 1041.932703] BUG: unable to handle kernel paging request at ffffffffffffffa8
>[ 1041.937121] IP: [<ffffffff8105cf6b>] kthread_data+0x10/0x16
>[ 1041.941424] PGD 2011067 PUD 2013067 PMD 0 
>[ 1041.945789] Oops: 0000 [#2] SMP 
>[ 1041.950028] Modules linked in: netconsole configfs dm_mod snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support snd_hda_codec_conexant snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec pcspkr snd_hwdep snd_pcm nouveau snd_timer ttm snd lpc_ich i2c_i801 r8169 soundcore mfd_core iosf_mbi battery wmi ac acpi_cpufreq uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev i915 button video drm_kms_helper drm [last unloaded: netconsole]
>[ 1041.965748] CPU: 1 PID: 1188 Comm: kworker/u8:4 Tainted: G      D W     3.16.0-rc6_drm-intel-nightly_af1aab_20140724_debug+ #766
>[ 1041.970141] task: ffff88007388c1e0 ti: ffff880173fb4000 task.ti: ffff880173fb4000
>[ 1041.974442] RIP: 0010:[<ffffffff8105cf6b>]  [<ffffffff8105cf6b>] kthread_data+0x10/0x16
>[ 1041.978779] RSP: 0018:ffff880173fb76e8  EFLAGS: 00010002
>[ 1041.983009] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff839abf80
>[ 1041.987216] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88007388c1e0
>[ 1041.991338] RBP: ffff880173fb76e8 R08: ffff88007388c270 R09: 0000000000000001
>[ 1041.995456] R10: 0000000000000001 R11: 000000000000ba33 R12: 0000000000000001
>[ 1041.999586] R13: ffff88007388c6f0 R14: ffff880173fb7888 R15: ffff880173fb7470
>[ 1042.003710] FS:  0000000000000000(0000) GS:ffff88017fc80000(0000) knlGS:0000000000000000
>[ 1042.007895] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>[ 1042.012078] CR2: 0000000000000028 CR3: 0000000002010000 CR4: 00000000001007e0
>[ 1042.016257] Stack:
>[ 1042.020361]  ffff880173fb7708 ffffffff8105790c ffffffff839abf80 ffff88017fc93140
>[ 1042.024811]  ffff880173fb7828 ffffffff81832ed2 ffff880173fb7768 ffff88007388c1e0
>[ 1042.029214]  0000000000013140 0000000000004000 0000000000000282 ffff88007388c1e0
>[ 1042.033596] Call Trace:
>[ 1042.037694]  [<ffffffff8105790c>] wq_worker_sleeping+0x12/0x89
>[ 1042.041864]  [<ffffffff81832ed2>] __schedule+0x165/0x967
>[ 1042.045988]  [<ffffffff81080d96>] ? trace_hardirqs_on+0xd/0xf
>[ 1042.050105]  [<ffffffff81371d05>] ? put_io_context+0x4d/0x87
>[ 1042.054195]  [<ffffffff81371e00>] ? put_io_context_active+0xa8/0xb1
>[ 1042.058249]  [<ffffffff8183373e>] schedule+0x6a/0x6c
>[ 1042.062282]  [<ffffffff81041f10>] do_exit+0x8c9/0x928
>[ 1042.066303]  [<ffffffff810056c7>] oops_end+0xa7/0xb0
>[ 1042.070303]  [<ffffffff8182b35f>] no_context+0x299/0x2c5
>[ 1042.074285]  [<ffffffff817321ac>] ? cpufreq_governor_dbs+0x5e1/0x5e1
>[ 1042.078275]  [<ffffffff8182b6a4>] __bad_area_nosemaphore+0x1ce/0x1ef
>[ 1042.082263]  [<ffffffff8182b6d8>] bad_area_nosemaphore+0x13/0x15
>[ 1042.086251]  [<ffffffff81035774>] __do_page_fault+0x416/0x4b5
>[ 1042.090233]  [<ffffffff810569b7>] ? queue_delayed_work_on+0x5d/0x6b
>[ 1042.094226]  [<ffffffff81080d2d>] ? trace_hardirqs_on_caller+0x142/0x19e
>[ 1042.098226]  [<ffffffff81080d96>] ? trace_hardirqs_on+0xd/0xf
>[ 1042.102190]  [<ffffffff813933dd>] ? trace_hardirqs_off_thunk+0x3a/0x3c
>[ 1042.106149]  [<ffffffff810358bc>] do_page_fault+0xc/0xe
>[ 1042.109979]  [<ffffffff818396b2>] page_fault+0x22/0x30
>[ 1042.113715]  [<ffffffffa00e5f4f>] ? intel_dp_set_signal_levels+0x496/0x822 [i915]
>[ 1042.117421]  [<ffffffff81835bed>] ? mutex_unlock+0xe/0x10
>[ 1042.121079]  [<ffffffffa005961e>] ? drm_dp_dpcd_access+0x6d/0xe9 [drm_kms_helper]
>[ 1042.124834]  [<ffffffffa00e8523>] intel_dp_reset_link_train.constprop.16+0x21/0x36 [i915]
>[ 1042.128563]  [<ffffffffa00e9c05>] intel_dp_start_link_train+0xaf/0x1fc [i915]
>[ 1042.132217]  [<ffffffffa00ea796>] intel_dp_check_link_status+0x112/0x13e [i915]
>[ 1042.135841]  [<ffffffffa00ea8a8>] intel_dp_hpd_pulse+0xe6/0x13f [i915]
>[ 1042.139439]  [<ffffffffa00ac7fc>] i915_digport_work_func+0xe6/0xff [i915]
>[ 1042.143032]  [<ffffffff81056d72>] process_one_work+0x25a/0x442
>[ 1042.146480]  [<ffffffff81056cdf>] ? process_one_work+0x1c7/0x442
>[ 1042.149776]  [<ffffffff81057629>] worker_thread+0x2f8/0x400
>[ 1042.152913]  [<ffffffff81057331>] ? pool_mayday_timeout+0x12d/0x12d
>[ 1042.155946]  [<ffffffff8105cbf0>] kthread+0xed/0xf5
>[ 1042.158866]  [<ffffffff8105cb03>] ? __init_kthread_worker+0x5a/0x5a
>[ 1042.161761]  [<ffffffff8183796c>] ret_from_fork+0x7c/0xb0
>[ 1042.164609]  [<ffffffff8105cb03>] ? __init_kthread_worker+0x5a/0x5a
>[ 1042.167445] Code: 00 ba 00 00 48 8b 80 b8 04 00 00 48 89 e5 5d 48 8b 40 98 48 c1 e8 02 83 e0 01 c3 0f 1f 44 00 00 48 8b 87 b8 04 00 00 55 48 89 e5 <48> 8b 40 a8 5d c3 0f 1f 44 00 00 55 ba 08 00 00 00 48 89 e5 48 
>[ 1042.177377] RIP  [<ffffffff8105cf6b>] kthread_data+0x10/0x16
>[ 1042.180518]  RSP <ffff880173fb76e8>
>[ 1042.183565] CR2: ffffffffffffffa8
>[ 1042.186536] ---[ end trace c924f0de8a14a7d9 ]---
>[ 1042.186593] Fixing recursive fault but reboot is needed!
>[ 1043.314306] [drm:edp_panel_vdd_off_sync] Turning eDP VDD off
>[ 1043.314372] [drm:edp_panel_vdd_off_sync] PP_STATUS: 0x00000000 PP_CONTROL: 0xabcd0000

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