[Bug 97596] [SKL] [regression] Flickering artefact window at top left of screens in kernel 4.8-rc5

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97596

--- Comment #7 from Elio <elio.martinez.monroy at intel.com> ---
Thanks a lot, bug confirmed. 
They key to reproduce the bug is the display arrange, i was able to reproduce
it just moving the displays one over the other.

Conditions: eDP over External Display, will causes that External Display
through HDMI fails.

HDMI over eDP will causes that eDP fails.

This was tested with 4.8 rc 5 kernel and 4.8rc7 as well, having same behavior.
Attaching dmesg with 4.8 rc5 and 4.8 rc7. Pictures and Xorg log.

Most important highlight on dmesg 

[  372.199938] [drm:drm_edid_to_eld] ELD: no CEA Extension found
[  372.199942] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:37:eDP-1] probed modes :
[  372.199945] [drm:drm_mode_debug_printmodeline] Modeline 38:"1920x1080" 60
141400 1920 1968 2000 2142 1080 1083 1089 1100 0x48 0x9
[  372.199947] [drm:drm_mode_debug_printmodeline] Modeline 39:"1920x1080" 48
113120 1920 1968 2000 2142 1080 1083 1089 1100 0x40 0x9
[  372.200354] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:46:HDMI-A-1]
[  372.200357] [drm:intel_hdmi_detect] [CONNECTOR:46:HDMI-A-1]
[  372.231651] [drm:intel_hdmi_dp_dual_mode_detect] DP dual mode adaptor (type
2 HDMI) detected (max TMDS clock: 300000 kHz)
[  372.231653] [drm:drm_detect_monitor_audio] Monitor has basic audio support
[  372.231686] [drm:drm_edid_to_eld] ELD monitor DELL 2408WFP
[  372.231688] [drm:parse_hdmi_vsdb] HDMI: DVI dual 0, max TMDS clock 0,
latency present 0 0, video latency 0 0, audio latency 0 0
[  372.231689] [drm:drm_edid_to_eld] ELD size 36, SAD count 1
[  372.231706] [drm:drm_helper_probe_single_connector_modes]
[CONNECTOR:46:HDMI-A-1] probed modes :
[  372.231707] [drm:drm_mode_debug_printmodeline] Modeline 70:"1920x1200" 60
154000 1920 1968 2000 2080 1200 1203 1209 1235 0x48 0x9
[  372.231709] [drm:drm_mode_debug_printmodeline] Modeline 72:"1920x1080" 60
148500 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
[  372.231710] [drm:drm_mode_debug_printmodeline] Modeline 103:"1920x1080" 60
148352 1920 2008 2052 2200 1080 1084 1089 1125 0x40 0x5
[  372.231711] [drm:drm_mode_debug_printmodeline] Modeline 73:"1920x1080i" 60
74250 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15
[  372.231712] [drm:drm_mode_debug_printmodeline] Modeline 104:"1920x1080i" 60
74176 1920 2008 2052 2200 1080 1084 1094 1125 0x40 0x15
[  372.231713] [drm:drm_mode_debug_printmodeline] Modeline 77:"1600x1200" 60
162000 1600 1664 1856 2160 1200 1201 1204 1250 0x40 0x5
[  372.231715] [drm:drm_mode_debug_printmodeline] Modeline 90:"1280x1024" 75
135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
[  372.231716] [drm:drm_mode_debug_printmodeline] Modeline 76:"1280x1024" 60
108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5
[  372.231717] [drm:drm_mode_debug_printmodeline] Modeline 78:"1152x864" 75
108000 1152 1216 1344 1600 864 865 868 900 0x40 0x5
[  372.231718] [drm:drm_mode_debug_printmodeline] Modeline 74:"1280x720" 60
74250 1280 1390 1430 1650 720 725 730 750 0x40 0x5
[  372.231719] [drm:drm_mode_debug_printmodeline] Modeline 105:"1280x720" 60
74176 1280 1390 1430 1650 720 725 730 750 0x40 0x5
[  372.231720] [drm:drm_mode_debug_printmodeline] Modeline 91:"1024x768" 75
78750 1024 1040 1136 1312 768 769 772 800 0x40 0x5
[  372.231721] [drm:drm_mode_debug_printmodeline] Modeline 93:"1024x768" 60
65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
[  372.231722] [drm:drm_mode_debug_printmodeline] Modeline 94:"800x600" 75
49500 800 816 896 1056 600 601 604 625 0x40 0x5
[  372.231723] [drm:drm_mode_debug_printmodeline] Modeline 79:"800x600" 60
40000 800 840 968 1056 600 601 605 628 0x40 0x5
[  372.231724] [drm:drm_mode_debug_printmodeline] Modeline 101:"720x576i" 50
13500 720 732 795 864 576 580 586 625 0x40 0x101a
[  372.231726] [drm:drm_mode_debug_printmodeline] Modeline 106:"720x480" 60
27027 720 736 798 858 480 489 495 525 0x40 0xa
[  372.231727] [drm:drm_mode_debug_printmodeline] Modeline 75:"720x480" 60
27000 720 736 798 858 480 489 495 525 0x40 0xa
[  372.231728] [drm:drm_mode_debug_printmodeline] Modeline 113:"720x480i" 60
13514 720 739 801 858 480 488 494 525 0x40 0x101a
[  372.231729] [drm:drm_mode_debug_printmodeline] Modeline 100:"720x480i" 60
13500 720 739 801 858 480 488 494 525 0x40 0x101a
[  372.231730] [drm:drm_mode_debug_printmodeline] Modeline 81:"640x480" 75
31500 640 656 720 840 480 481 484 500 0x40 0xa
[  372.231731] [drm:drm_mode_debug_printmodeline] Modeline 107:"640x480" 60
25200 640 656 752 800 480 490 492 525 0x40 0xa
[  372.231732] [drm:drm_mode_debug_printmodeline] Modeline 85:"640x480" 60
25175 640 656 752 800 480 490 492 525 0x40 0xa
[  372.231733] [drm:drm_mode_debug_printmodeline] Modeline 89:"720x400" 70
28320 720 738 846 900 400 412 414 449 0x40 0x6
[  372.232851] [drm:drm_mode_addfb2] [FB:130]
[  372.233818] [drm:i915_gem_open] 
[  372.241693] [drm:i915_gem_context_create_ioctl] HW context 1 created
[  372.242217] [drm:i915_gem_object_create_stolen] creating stolen object:
size=4000
[  372.242220] [drm:i915_pages_create_for_stolen] offset=0x806000, size=16384
[  372.242468] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[  372.243136] [drm:i915_gem_context_create_ioctl] HW context 1 created

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