Public bug reported:

Since yesterday, gnome-shell is broken on Precise 12.04 LTS.
On booting, the "gnome classic" mode is launched instead.

Here is the gdb output, please ask if you need more info, it's easy to
reproduce.

Description:    Ubuntu 12.04.2 LTS
Release:        12.04
gnome-shell 3.4.1-0ubuntu2

(gdb) run
Starting program: /usr/bin/gnome-shell 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe7585700 (LWP 10160)]
[New Thread 0x7fffe6b7e700 (LWP 10161)]
Xlib:  extension "GLX" missing on display ":0.0".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff304c9f8 in ?? () from /usr/lib/x86_64-linux-gnu/libcogl.so.9
(gdb) bt
#0  0x00007ffff304c9f8 in ?? () from /usr/lib/x86_64-linux-gnu/libcogl.so.9
#1  0x00007ffff3521c84 in ?? () from 
/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#2  0x00007ffff3538c16 in ?? () from 
/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#3  0x00007ffff354433a in ?? () from 
/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#4  0x00007ffff3544850 in clutter_init () from 
/usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
#5  0x00007ffff78d4196 in meta_init () from /usr/lib/libmutter.so.0
#6  0x00000000004015e7 in main ()

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1177905

Title:
  gnome-shell crash on libclutter/libcogl on 12.04 (LTS)

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