GNU gdb 6.6.90.20070912-debian
Copyright (C) 2007 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 "x86_64-linux-gnu".
(gdb) Reading symbols from /usr/bin/Xorg...Reading symbols from /usr/lib/debug/usr/bin/Xorg...done.
Using host libthread_db library "/lib/libthread_db.so.1".
done.
(gdb) (gdb) Signal        Stop	Print	Pass to program	Description
SIGUSR1       No	Yes	Yes		User defined signal 1
(gdb) Starting program: /usr/bin/Xorg 
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7fff40ffe000

X.Org X Server 1.4.0
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Linux Debian (xorg-server 2:1.4.1~git20071119-1)
Current Operating System: Linux mate 2.6.23 #1 SMP PREEMPT Mon Oct 22 02:55:05 MSD 2007 x86_64
Build Date: 20 November 2007  02:55:16AM
 
	Before reporting problems, check http://wiki.x.org
	to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
	(++) from command line, (!!) notice, (II) informational,
	(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed Nov 28 09:46:46 2007
(==) Using config file: "/etc/X11/xorg.conf"
[Thread debugging using libthread_db enabled]
[New Thread 0x2b0969ca02a0 (LWP 22564)]
(II) Module "i2c" already built-in
(II) Module "ddc" already built-in
(II) Module "i2c" already built-in
(II) Module "ddc" already built-in
(II) Module "ramdac" already built-in
expected keysym, got XF86KbdLightOnOff: line 70 of pc
expected keysym, got XF86KbdBrightnessDown: line 71 of pc
expected keysym, got XF86KbdBrightnessUp: line 72 of pc
expected keysym, got XF86KbdLightOnOff: line 70 of pc
expected keysym, got XF86KbdBrightnessDown: line 71 of pc
expected keysym, got XF86KbdBrightnessUp: line 72 of pc
Could not init font path element /usr/share/fonts/X11/cyrillic, removing from list!
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Duplicate shape name ""
>                   Using last definition
> Warning:          Multiple doodads named ""
>                   Using first definition
> Warning:          Multiple doodads named ""
>                   Using first definition
> Warning:          Multiple doodads named ""
>                   Using first definition
> Warning:          Multiple doodads named ""
>                   Using first definition
> Warning:          Multiple doodads named ""
>                   Using first definition
> Warning:          Multiple doodads named ""
>                   Using first definition
Errors from xkbcomp are not fatal to the X server
../../src/rhd_cursor.c:109: setCursorImage: Assertion '(Cursor->Width > 0) && (Cursor->Width <= MAX_CURSOR_WIDTH)' failed.

Fatal server error:
Server aborting


Program received signal SIGUSR1, User defined signal 1.

Program received signal SIGUSR1, User defined signal 1.

Program received signal SIGUSR1, User defined signal 1.

Program exited with code 01.
(gdb) You can't do that without a process to debug.
(gdb) No stack.
(gdb)