What about loading that driver with an /etc/X11/xorg.conf file?
Maybe you also need libglx package?
a little update: I tried to configure the xorg.conf file but there is not such file in our distro, so I created a file as suggested but the system did stop to work.
After two days of search, I did install the linux-free-firmware that (it seems) contains the firmware for the radeon gpu card. When rebooted I noticed no complains about "acceleration disabled", but the screen was frozen on startup as usual.
Then I searched for a way to make the video at least usable, so I stumbled on this post on MacRumors:"Modern Xorg on aniBook G3 Snow:Solved!" and applied that "fix".
Now the screen is at least reusable, but in my case glxgears returns this error:"
radeon: Invalid PCI ID.
libGL error: glx: failed to create dri3 screen
libGL error: failed to load driver: radeonsi
radeon: Invalid PCI ID.
libGL error: glx: failed to create dri2 screen
libGL error: failed to load driver: radeonsi
LLVM ERROR: Relocation type not implemented yet!
Annullato
I bet this "fix" plus the mesa-amber package could fix this issue, but I can't select the mesa-amber packages (dunno how to do, but I tried the mesa-amber.sh thing).
glxgears
unknow chip id 0x4c57, cannot guess.
libGL error: failed to create dri screen
libGL error: failed to load driver: r200
LLVM ERROR: relocation tyoe not implemented yet!
(sob!)
@sergio I assumed you had those firmware packages installed. There are more on my website which get installed if you install MintPPC the usual way.