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

Hi Link,

On Wed, 2024-09-11 at 19:44 -0300, Link Electronics wrote:
> I would like to thank Adrian Glaubitz in advance for his many years of
> continuing to support the PowerPC platform on Debian Linux.

You're very welcome. I'm glad it's useful to you.

> 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.

Good to hear that lots of the stuff actually works.

> 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.

This may or may not be a bug in the radeon or amdgpu drivers. I assume they are
rarely tested on big-endian targets.

> I'm using linux-image-6.10.9-powerpc64 (4kb pagesize?)

Yes, that's the 4k pagesize kernel. The 64k pagesize kernel has the -64k suffix.

> I can make the screen work with the framebuffer but no hw acceleration then.
> What can I do to try to resolve this?

Can you try to gather more information from the logs, i.e. the Xorg.0.log file?

Thanks,
Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
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