Bug#515512: xserver-xorg-video-radeon: xserver freezes on ati rv280

[Alex Deucher]

On Sun, Feb 15, 2009 at 4:49 PM, Miloslav Semler <majkls at tiscali.cz> wrote:
> Package: xserver-xorg-video-radeon
> Version: 1:6.9.0-1+lenny4
> Severity: important
>
> Hello,
> I have an problem with driver xserver-xorg-video-radeon. If I start
> x.org with this driver, it consumes 95+% cpu and do nothing. Instead of
> continuing in boot, it hangs and shut down monitor to DMPS. I tested
> older kernel, which worked ok, but now it does same. The problem was
> occured when I upgraded from sarge to lenny. Xserver is binary
> distribution, drivers and kernel too. I also tested default x.org
> configuration, but there was same results. Now I must use
> framebuffer. It works, but performace is very poor.
>

Sounds like an AGP problem.  Try setting another AGP mode.  Add the
following option to the device section of your config:
Option "AGPMode" "X"
where X = 1 or 2 or 4 or 8.
When you find an AGP mode that works, let me know and I'll add a quirk
to the driver.

Alex