Comment 7 for bug 339091

Trying to attach gdb wasn't very successful unfortunately. I do have the debug symbols of X.org, libx11, libc6, etc. installed, but still the stack trace is totally useless. Perhaps the "Cannot access memory at address 0xffe85fec" has something to do with it, but I don't know why it's doing that.

$ ps aux|grep X
root 3470 0.0 5.2 115892 53076 tty7 Ss+ Mar06 0:45 /usr/bin/X :0 -br -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7
martin 6497 0.0 0.0 3348 816 pts/0 S+ 08:39 0:00 grep X
0 martin@tick:~/xdebug
$ sudo gdb /usr/bin/X
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
(no debugging symbols found)
(gdb) attach 3470
Attaching to program: /usr/bin/X, process 3470
Cannot access memory at address 0xffe85fec
(gdb) bt
#0 0xb7f2b430 in ?? ()
#1 0xb783fee2 in ?? ()
#2 0xb77d60ff in ?? ()
#3 0x0817c0eb in ?? ()
#4 0x08145088 in ?? ()
#5 0x080910c8 in ?? ()
#6 0x081319a4 in ?? ()
#7 0x0808d1ce in ?? ()
#8 0x080721fd in ?? ()
#9 0xb7af5775 in ?? ()
#10 0x080716b1 in ?? ()
(gdb) quit
The program is running. Quit anyway (and detach it)? (y or n) y
Detaching from program: /usr/bin/X, process 3470

XrandR information: (LVDS off, external TFT on, laptop is docked and closed):

$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1280 x 1280
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected (normal left inverted right x axis y axis)
   1280x800 59.8 +
   1024x768 85.0 75.0 70.1 60.0
   832x624 74.6
   800x600 85.1 72.2 75.0 60.3 56.2
   640x480 85.0 72.8 75.0 59.9
   720x400 85.0
   640x400 85.1
   640x350 85.1
TMDS-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 340mm x 270mm
   1280x1024 75.0*+ 60.0
   1280x960 60.0
   1152x864 75.0
   1024x768 85.0 75.0 70.1 60.0
   832x624 74.6
   800x600 85.1 72.2 75.0 60.3 56.2
   640x480 85.0 75.0 72.8 66.7 59.9
   720x400 70.1
TV disconnected (normal left inverted right x axis y axis)