Arch Linux

Midov

Member

Registered: 2013-10-22

Posts: 9

Switch from YCbCr to RGB

My screen is plugged with HDMI to Radeon R380 gpu, with open source AMDGPU drivers currently.
With older kernels (up to 4.14.12-1) screen would default to RGB colors so everything was fine.
After upgrading to current 4.15.3-2 it seems like it suddenly decided that it will now default to YCbCr color, and now my screen is mostly pink.

Before upgrading to AMDGPU i used Catalyst drivers, and it used YCbCr on all kernel versions, but it had simple dropdown that would let me select between RGB 4:4:4, YCbCr 4:2:2 and so on. I would like to avoid going back to Catalyst if possible though.
Unfortunately i cannot find anything about pixel colors in AMDGPU documentation.
How can I switch my screen back to RGB ?

Last edited by Midov (2018-02-25 09:30:29)

Midov

Member

Registered: 2013-10-22

Posts: 9

Re: Switch from YCbCr to RGB

Okay, turns out that everyting goes back to normal and i have proper RGB pixel colors after i disabled amdgpu.dc module like V1del said in here .
It would still be nice to have a way to switch between those modes, but at least i can see my screen properly for now.

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: Switch from YCbCr to RGB

You definitely want to report that upstream, if no one complains it will never get fixed.

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R00KIE
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