ATI rv250 hangs with opengl apps

[Jamie Guinan]

Hi,

Since xorg > 6.8.0, including CVS as of a few days ago, opengl apps 
have been getting my x session stuck - X cursor is still alive, and I 
can ssh in from outside, but X session is stuck and either 
<some-gl-app> or Xorg is spinning at 99%.  Kill -9 <gl-app> brings the 
system to its knees, I get a trickle of characters over ssh connection 
before I give up and hit reset.

glxgears reliably triggers the problem after 3 or 4 seconds, so
it is easy to reproduce.

I saw some similar bug reports,

  https://bugs.freedesktop.org/show_bug.cgi?id=3510
  https://bugs.freedesktop.org/show_bug.cgi?id=2012

A few lines from Xorg.0.log,

(--) PCI:*(1:0:0) ATI Technologies Inc Radeon RV250 If [Radeon 9000] 
rev 1, Mem @ 0xe8000000/26, 0xf1000000/16, I/O @ 0xa000/8
(--) PCI: (1:0:1) ATI Technologies Inc Radeon RV250 [Radeon 9000] 
(Secondary) rev 1, Mem @ 0xec000000/26, 0xf1010000/16

(II) RADEON(0): AGP Fast Write disabled by default
(II) RADEON(0): Depth moves disabled by default

System is SMP dual-celeron mendocino, Intel 440BX, vanilla 2.6.13 
kernel,

  CONFIG_SMP=y
  CONFIG_PREEMPT=y
  CONFIG_PREEMPT_BKL=y

Complete logs at,

  http://www.bluebutton.com/misc/xorg/  (config.gz, xorg.conf)
  http://www.bluebutton.com/misc/xorg/6.8.0/
  http://www.bluebutton.com/misc/xorg/cvs-latest/

If it will help, I'm willing to do the "binary search of CVS 
snapshots" to (with luck) narrow down where the bug is (assuming its 
only one bug), but if anyone can point to some reasonable before-
and-after snapshot points to test around, that would be nice.

Thanks,
-Jamie