[Bug 99291] R9285 amd-staging-4.7 bad gamma since drm/amd/display: Implement gamma correction using input LUT

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99291

            Bug ID: 99291
           Summary: R9285 amd-staging-4.7 bad gamma since drm/amd/display:
                    Implement gamma correction using input LUT
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: adf.lists at gmail.com

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

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