Bug 99291

Summary:	R9285 amd-staging-4.7 bad gamma since drm/amd/display: Implement gamma correction using input LUT
Product:	DRI	Reporter:	Andy Furniss <adf.lists>
Component:	DRM/AMDgpu	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	harry.wentland
Version:	DRI git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

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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