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[David Leonard <David.Leonard@xxxxxxxxx>]

Similar problem with fresh install of ubuntu desktop 10.04/i386 under VMware Workstation 5.0.0-13124;
X would just keep crashing out (even with failsafe/vesa) with :

  Illegal instruction at address 0xb76c1ca3
  Caught signal 4 (Illegal instruction). Server aborting

Workaround/solution was to move /lib/tls/i686/cmov/libc.so.6 out of the
way.

That library owned by: libc6-i686 (2.11.1-0ubuntu)

gdb session of "X -once :0":

#0  0xb75b9ca3 in ?? () from /lib/tls/i686/cmov/libc.so.6
#1  0xb739b37d in _glapi_add_dispatch ()
   from /usr/lib/xorg/modules/extensions/libglx.so
#2  0xb5f2b469 in _mesa_map_function_spec () from /usr/lib/dri/swrast_dri.so
#3  0xb5f2b558 in _mesa_map_function_array () from /usr/lib/dri/swrast_dri.so
#4  0xb5f2b640 in _mesa_map_static_functions () from /usr/lib/dri/swrast_dri.so
#5  0xb5ede70c in driInitExtensions () from /usr/lib/dri/swrast_dri.so
#6  0xb5edf10c in ?? () from /usr/lib/dri/swrast_dri.so
#7  0xb73a23dd in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
#8  0xb73a1732 in ?? () from /usr/lib/xorg/modules/extensions/libglx.so
#9  0x080cb8c5 in InitExtensions ()
#10 0x08066bd8 in _start ()

Program received signal SIGILL, Illegal instruction.
0xb75b9ca3 in ?? () from /lib/tls/i686/cmov/libc.so.6
(gdb) x/i $eip
=> 0xb75b9ca3:  palignr $0x8,%xmm3,%xmm2

-- 
upgrade from karmic to lucid: gui is crashing on login
https://bugs.launchpad.net/bugs/542357
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