Bug#606372: Hard power cycle fixes it.

["C. Scott Ananian" <cscott@cscott.net>]

A power cycle (power off, power on) fixes the crash.  Restarting just
X didn't fix the problem; reverting to
xserver-common_2%3a1.7.7-9_all.deb,
xserver-xorg-core_2%3a1.7.7-9_i386.deb,
xserver-xephyr_2%3a1.7.7-9_i386.deb, and
xserver-xorg-video-intel_2%3a2.13.0-2_i386.deb also didn't fix the
problem.

My diagnosis is that this is a not-recent bug in initializing the GPU
-- the GPU can get into some funny state that the current init code
can not fix, and which will cause a later segfault in the DRI code.

*However* another possibility is that rebooting changed the kernel
version.  The logs from the bug I submitted above say the kernel was:

Linux version 2.6.32-5-686 ... Sat Oct 30 22:47:19 UTC 2010
which corresponds to debian version linux-2.6 (2.6.32-27), and my
current running kernel version (which doesn't show the bug) is:

Linux skiffserv 2.6.32-5-686 ... Thu Nov 25 18:43:34 UTC 2010
which corresponds to debian version linux-2.6 (2.6.32-28).

I will try to downgrade the kernel to determine which of these
theories is correct.
  --scott

-- 
                         ( http://cscott.net/ )