https://bugs.freedesktop.org/show_bug.cgi?id=95017
--- Comment #3 from Mathieu Malaterre mathieu.malaterre@gmail.com --- Indeed that solve the symptoms. I discover this was also documented here:
https://wiki.debian.org/PowerPC/FAQ#How_do_I_get_graphics_working.3F
[...] image=/boot/vmlinux label=Linux read-only initrd=/boot/initrd.img append="radeon.agpmode=-1 modprobe.blacklist=ams" [...]
I am not sure what the 'ams' thingy is doing, but I am using it over here.
The funny thing is that dragging window and moving them around makes the pointer and the window out-of-sync. Still usable though after a while.
If AGP is simply not supported on PowerPC, it would be nice to have a clearer message (or at least a warning).
Thanks