Lockup on X server start with Radeon on X.org 6.9

[Kevin Shanahan]

On Thu, Jan 12, 2006 at 09:57:38AM +1030, Kevin Shanahan wrote:
> Quick summary:
>   - Hardware is a Radeon Mobility M6 LY, x86
>   - Had no problems with xorg 6.8.2, only since upgrade to 6.9 (Debian)
>   - Starting X with Load "dri" in the module section almost always hard
>     locks the system (say 95% of the time).
>   - If I manage to get in that 5% that works, the server is perfectly
>     stable to use, including GL apps (GLQuake is what I'm mostly using).
>   - Without the dri module loaded, the server starts most of the time
>     (say 95%), but it does seem to occasionally lock up as well. It's
>     possible that these cases might have been due to incomplete reset of
>     the video card after a previous lockup with dri, but I did always
>     power off the laptop between boots, since alt-sysrq-b doesn't work
>     with these lockups.
>   - VT switching away from the x-server seems okay, but switching back
>     again usually locks up the machine.

For those who didn't see on dri-devel, the lockups on startup and VT
switch were both solved by using benh's patch from here:
  http://lists.freedesktop.org/archives/xorg/2005-December/011679.html

Cheers,
Kevin.