Bug 113811

Summary: Screen is too dark with i915
Product: Drivers Reporter: kapsh
Component: Video(DRI - Intel)Assignee: intel-gfx-bugs (intel-gfx-bugs)
Status: CLOSED INVALID    
Severity: normal CC: intel-gfx-bugs, kapsh
Priority: P1    
Hardware: Intel   
OS: Linux   
Kernel Version: 4.4.4 Subsystem:
Regression: Yes Bisected commit-id:
Attachments: EDID as reported by read-edid
xrandr --verbose

Description kapsh 2016-03-06 04:05:43 UTC
Created attachment 207761 [details]
EDID as reported by read-edid

Maybe it sounds strange but after updating to kernel 4.4.4 I encountered with some problem: my screen became too dark and looks like "high contrast". I can't say surely that it is not my PC problem but everything works normal on 4.4.3.

Searching with git bisect reports that first bad commit is:
[6de4682d2845d6aa8883ae62e3ed1b2f915df4e8] drm/i915/dp: fall back to 18 bpp when sink capability is unknown

Hardware details. 
Monitor: LG "23MP67D" connected to Display port. 
Processor: Intel(R) Core(TM) i5-6600
Comment 1 kapsh 2016-03-06 04:06:09 UTC
Created attachment 207771 [details]
xrandr --verbose
Comment 2 Jani Nikula 2016-03-07 08:55:28 UTC
Please file new drm/i915 bugs at the freedesktop.org bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
Comment 3 kapsh 2016-03-07 12:12:14 UTC
Okay, thanks for the advice!