Bug 96954 - [BDW] Flashing/flickering when playing games
Summary: [BDW] Flashing/flickering when playing games
Status: CLOSED WONTFIX
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-07-16 05:44 UTC by Amish Naidu
Modified: 2017-03-06 17:22 UTC (History)
2 users (show)

See Also:
i915 platform: BDW
i915 features: display/watermark

Attachments
Short video which shows the screen flashing. Ignore the visible (light) background near top in the video, it's an artefact produced while recording. (336.99 KB, video/mp4)
2016-07-16 05:44 UTC, Amish Naidu 		no flags Details
kernel log with drm.debug=14 and log buf = 4M (108.18 KB, text/x-log)
2016-07-16 05:47 UTC, Amish Naidu 		no flags Details
Xorg log from /var/log/Xorg.0.log (22.43 KB, text/x-log)
2016-07-16 05:48 UTC, Amish Naidu 		no flags Details
View All

Description Amish Naidu 2016-07-16 05:44:41 UTC 
Created attachment 125098 [details]
Short video which shows the screen flashing. Ignore the visible (light) background near top in the video, it's an artefact produced while recording.

Some backstory:
Lubuntu 16.04 didn't have `xserver-xorg-video-intel` installed by default, which caused some problems (https://bugs.freedesktop.org/show_bug.cgi?id=96795) but other than that playing 3D games and HD videos worked perfectly, so I installed that package and reinstalled other graphics components from Ubuntu's repository. This made the aforementioned bug go away, but created an issue where the screen flashes/flickers while playing games, while it is stable every other time.

See attachment to see the flashing. (Recorded with SimpleScreenRecorder) 

xserver-xorg-video-intel, version: 2:2.99.917+git20160325-1ubuntu1
Kernel: 4.4.0-28-generic
Distribution: Lubuntu 16.04 fresh install
Comment 1 Amish Naidu 2016-07-16 05:46:55 UTC 
Pardon me, I forgot to add an important detail:
System: Lenovo G50-80 with Intel 5500 Integrated graphics chip (Broadwell-U Integrated Graphics, inside Core i3-5005U)
Comment 2 Amish Naidu 2016-07-16 05:47:54 UTC 
Created attachment 125099 [details]
kernel log with drm.debug=14 and log buf = 4M
Comment 3 Amish Naidu 2016-07-16 05:48:15 UTC 
Created attachment 125100 [details]
Xorg log from /var/log/Xorg.0.log
Comment 4 Rami 2017-02-21 15:14:09 UTC 
Can you re-test with latest drm-tip kernel from (https://cgit.freedesktop.org/drm-tip branch drm-tip) with drm.debug=0xe
Comment 5 Elio 2017-03-06 17:21:56 UTC 
Closing since we are not having response from reporter

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