Bug#446820: xorg: X freezes on screensaver or strace

[Pierre Ynard <linkfanel@yahoo.fr>]

Package: xorg
Version: 1:7.3+2
Severity: grave
Justification: causes non-serious data loss


Recently I restarted my X server and took into account the last
upgrade. Now it appears that when I go away and come back to unlock the
screensaver, nothing responds. /usr/bin/X takes 99% of the CPU. I wanted
to investigate, but attaching the process with strace -p XXXX freezes
X in the same way (nothing at all is output by the strace). Then it
needs to be killed with a SIGKILL.

I reproduced the problem on a vanilla 2.6.23 kernel. Of course, this is
annoying because all my session and open work are lost...

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i586)

Kernel: Linux 2.6.23-grsec
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash