Lockup on x server startup with xorg 6.9 on Radeon (R100)

[Kevin S. <kms...@di...>]

Hi,

Since upgrading from xorg 6.8.2 to 6.9 (Debian), I've been getting
system lockups when starting the xserver. If dri is commented out in
the module section of xorg.conf, then it works fine. The wierd thing
is that occasionally (say 1/20 attempts) the xserver will start (with
dri enabled). Once it gets that far it seems perfectly stable to use,
including 3d.

More details are here:
  http://bugs.debian.org/345729
  http://lists.freedesktop.org/archives/xorg/2006-January/012206.html

Hopefully that's all the important details. Would someone here be
willing to guide me as to how to track down the cause?

Thanks,
Kevin.