https://bugs.freedesktop.org/show_bug.cgi?id=107559
Bug ID: 107559
Summary: no color format choice in amdgpu
Product: xorg
Version: unspecified
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/AMDgpu
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Created attachment 141066
--> https://bugs.freedesktop.org/attachment.cgi?id=141066&action=edit
The xorg log
I have a really crappy Philips "HD ready" tv. This tv has no options to change
the color format, and it always assumes full rgb. The problem is now that I
upgraded my graphics card, and now with the RX 580 I'm using the amdgpu driver.
amdgpu chooses YCrCb or limited RGB (but seemingly not reported as supported,
so not likely) automatically instead of RGB, and all my colors look really bad.
Black levels are grey and everything looks washed out and blurry.
>From xorg log:
Information [ 6.523] (II) AMDGPU(0): Supported color encodings: RGB
4:4:4 YCrCb 4:4:4
If I use an adapter and plug it in via DVI instead of HDMI, it looks fine. That
has its compromises though (I now have to connect my 2nd monitor by a VGA to
HDMI adapter, and that has its issues). Kernel 4.18 also breaks this
work-around; it doesn't recognize any resolutions, and seemingly no EDID at
all. HDMI is same as before.
I also tried overriding the EDID and setting YCrCb as not supported, but failed
The solution to all of this hassle would be to have the option "output_csc"
available on amdgpu as it's apparently possible with radeon
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