check_gl_texture_size crashed with SIGSEGV in __libc_writev()

[rumpl]

crash occured when logging in in a locked screen session

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: libgnome-desktop-3-2 3.3.5-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-17.26-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
ApportVersion: 1.92-0ubuntu1
Architecture: amd64
Date: Tue Feb 21 20:38:59 2012
ExecutablePath: /usr/lib/gnome-desktop3/check_gl_texture_size
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120114)
ProcCmdline: /usr/lib/gnome-desktop3/check_gl_texture_size
ProcEnviron:

SegvAnalysis:
 Segfault happened at: 0x7f6a288e4b60: add %al,(%rax)
 PC (0x7f6a288e4b60) in non-executable VMA region: 0x7f6a288e1000-0x7f6a28bac000 rw-p None
 source "%al" ok
 destination "(%rax)" (0x00000000) not located in a known VMA region (needed writable region)!
SegvReason:
 executing writable VMA None
 writing NULL VMA
Signal: 11
SourcePackage: gnome-desktop3
StacktraceTop:
 writev () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
 ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
 xcb_writev () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
 _XSend () from /usr/lib/x86_64-linux-gnu/libX11.so.6
Title: check_gl_texture_size crashed with SIGSEGV in writev()
UpgradeStatus: Upgraded to precise on 2012-02-21 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 __libc_writev (fd=<optimized out>, vector=<optimized out>, count=<optimized out>) at ../sysdeps/unix/sysv/linux/writev.c:56
 write_vec (count=0x7fff7c288c04, vector=0x7fff7c288c08, c=<optimized out>) at ../../src/xcb_conn.c:207
 _xcb_conn_wait (c=0x20f3310, cond=<optimized out>, vector=0x7fff7c288c08, count=0x7fff7c288c04) at ../../src/xcb_conn.c:433
 _xcb_out_send (c=0x20f3310, vector=0x7fff7c288c80, count=3) at ../../src/xcb_out.c:345
 xcb_writev (c=0x20f3310, vector=<optimized out>, count=<optimized out>, requests=2) at ../../src/xcb_out.c:293

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[brx75 (brx75x)]

In my case, check_gl_texture_size causes the gnome-settings-daemon to stop loading the desktop session.Aftrer killing the process, the session continues to load.
I've upgraded to 12.04 4 days ago. My laptop uses Intel Graphics with i915 module.

Can this be related to the same problem or it's bettere to open a new bug?