Re: AMD GPU Sea Islands Problem
Guyenne Tsui composed on 2020-12-06 22:17 (UTC):
>> What is "form rendering"?
> Sorry I meant "form of rendering"
>> Which Sea Islands do you have?
> Radeon R5 M430. I checked it again and it seems to be Southern Islands.
> I am not sure.
>> Which Debian are you using?
> Debian Testing
>> Which DDX driver are you using?
> I am not sure what is DDX driver. I installed firmware-amd-graphics in
> past and it worked automatically. However, a recent update broke it.
DDX means Device Dependent X.
I wasn't aware that amdgpu would ever work automatically with sea islands.
Normally it needs radeon.si_support=0 and amdgpu.si_support=1 to use it.
>> Do you have in your grub stanzas radeon.cik_support=0 amdgpu.cik_support=1 ???
> I tried both `radeon.cik_support=0 amdgpu.cik_support=0` and
> `radeon.si_support=0 amdgpu.si_support=1`. It seems that the latter
> works from the looks of `lspci -k`.
Try purging xserver-xorg-video-amdgpu and xserver-xorg-video-ati, then restarting
X. That should automatically result in using the modesetting X driver. It does for
my sea islands. If it's OK, either keep it that way, or try reinstalling only
xserver-xorg-video-amdgpu.
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