Need an option to set HDMI out to Full RGB 4:4:4
Submitted by Heiko Lechner
Assigned to Default DRI bug account
I have an old tv that only works well with FullRGB HDMI signals.
If YCbCr is used then the tv interrupts the hdmi link every few minutes and after a new hdmi negotiation the screen turns greenish. So I have to switch to another hdmi input and switch back to force a new negotiation which maybe works- very annoying.
Running Windows I can switch the output to FullRGB in AMD Radeon Software Adrenalin edition and everything is fine, so I assume that in Linux YCbCr is used by default (too).
In X.Org log file I find "AMDGPU(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4" so it seems to be possible.
But X.Org config: