Bug 89452

Summary: [Regression] Gamma controls broken on all SDL/Quake based games
Product: Mesa Reporter: Luke <lukebenes>
Component: Mesa coreAssignee: mesa-dev
Status: RESOLVED DUPLICATE QA Contact: mesa-dev
Severity: normal    
Priority: medium    
Version: git   
Hardware: Other   
OS: All   
See Also: https://bugzilla.libsdl.org/show_bug.cgi?id=971
i915 platform: i915 features:

Description Luke 2015-03-06 01:01:36 UTC
The gamma controls no longer work on (io)Quake based games with Mesa drivers. This regression occurred in 7.4 commit:


Maarten says it "should be driver ABI compatible", but it breaks Mesa's own drivers. I have observed this broken behavior with the Mesa software renderer, a Geforce 650 with Mesa 10.5 and 10.6, and ATI X1800 with Mesa 10.5 and 10.6. Ironically, the proprietary drivers have hacked around this bug, so they're not affected. Nouveau's default gamma is so dark that OpenArena is unplayable with my GTX 650. 

A sample of downstream bug reports from game engines/frameworks affected:

It should be possible for a game to control it's own gamma and not force the user to change system-wide settings every time they want to play. How can we fix this issue? Implement the same work-around as the proprietary drivers or revert/fix the commit that's causing this problem?
Comment 1 Michel Dänzer 2015-03-06 01:22:49 UTC

*** This bug has been marked as a duplicate of bug 27222 ***

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