Re: Need help to make a Radeon HD6970 to work on a G5

I forgot to say that I have installed firmware-linux-nonfree and
firmware-amd-graphics, and the last lines of dsmeg actually are:
[drm:uvd_v1_0_ib_test [radeon]] *ERROR* radeon: fence wait time out.
[drm:radeon_ib_ring_tests [radeon]] *ERROR* radeon: failed testing IB on
ring 5 (-110).

On Wed, Sep 11, 2024 at 7:44 PM Link Electronics <[email protected]>
wrote:

> Hello everyone, I would like to thank Adrian Glaubitz in advance for his
> many years of continuing to support the PowerPC platform on Debian Linux. I
> have a PowerMac G5 Late 2005, been using it for a few months now and was
> using the geforce 6600LE video card that came with it, I compiled some
> projects like DevilutionX, SpaceCadet Pinball, Nblood, Sonic decompilation
> games Mupen64plus etc and made them run with the geforce, but the
> performance is bad. Few days ago I changed it to a Radeon HD6970, it's a
> Cayman XT, I have the xserver-xorg-video-radeon and ati installed, but when
> loading LightDM or XFCE4, the image crashes with artifacts, I can switch to
> a tty console, in dmesg radeon says GPU lockup in ring 0 several times and
> in the end there is an error in drm:v1_0_ib_test and
> drm:radeon_ib_ring_tests, listing in lspci -k , it says kernel in use:
> radeon and kernel modules: radeon, amdgpu. I'm using
> linux-image-6.10.9-powerpc64 (4kb pagesize?) I can make the screen work
> with the framebuffer but no hw acceleration then.
> What can I do to try to resolve this?
>
> Thanks in advance
> Best regards, Link.
>