Bug#449211: xserver-xorg-video-ati: no video sync when dri enabled

[Alex Deucher]

On 11/5/07, Joachim Achtzehnter <joachim at kraut.ca> wrote:
> Brice Goglin wrote:
> >
> > Please try xserver-xorg-video-ati 1:6.7.195-2 currently in experimental.
> > The 6.6.x branch is dead anyway, all the work goes into 6.7.x, which
> > already works better in most cases (and supports RandR 1.2).
>
> After installing 1:6.7.195-2 the same problem still occurs, it works
> with dri disabled, but when dri is loaded the video is just a flashing
> mess, as if it isn't syncing. Switching to a console works fine, it is
> only the X screen on console 7 that is messed up.
>
> I'm attaching the server log file for a failing case, the initial bug
> report included the log file for the case with dri disabled.

TMDS is kind of flaky on the 9200s in general.  If your bios has bad
tmds pll tables, you can try Option "DefaultTMDSPLL" "true" to use the
generic timings in the driver.  That may help.  Another option would
be to try the various displaypriority options (see the radeon man
page).  If those options don't help, you could either edit the driver
or use radeontool to adjust the display priority on the memory
controller.  try setting bits 23-16 of GRPH_BUFFER_CNTL (offset 0x2F0)
to 0x00.

Alex