Bug 99291 - R9285 amd-staging-4.7 bad gamma since drm/amd/display: Implement gamma correction using input LUT
Summary: R9285 amd-staging-4.7 bad gamma since drm/amd/display: Implement gamma correc...
Status: RESOLVED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/AMDgpu (show other bugs)
Version: DRI git
Hardware: Other All
: medium normal
Assignee: Default DRI bug account
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Reported: 2017-01-05 22:07 UTC by Andy Furniss
Modified: 2017-01-05 23:38 UTC (History)
1 user (show)

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Description Andy Furniss 2017-01-05 22:07:48 UTC 
R9285 git amd-staging-4.7 xserver 1.18.4 

since 
da3877a82a8a9375f47334cffd375c795d7a0f8c
drm/amd/display: Implement gamma correction using input LUT

initial x gamma will be far too light.

Turns out that although xgamma reports 1.0, doing 

xgamma -gamma 1.0

corrects the issue
Comment 1 Andy Furniss 2017-01-05 22:56:13 UTC 
Forgot to put -

This is a single monitor connected via DVI.
Comment 2 Alex Deucher 2017-01-05 23:04:35 UTC 
There is a gamma fix in the latest amd-staging-4.7 branch I just pushed.  Does that help?
Comment 3 Andy Furniss 2017-01-05 23:38:09 UTC 
Yes, it's OK the updated branch.

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