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 "x86_64-linux-gnu"...
(no debugging symbols found)
(gdb) break gdk_x_error
Make breakpoint pending on future shared library load? (y or [n]) 
Breakpoint 1 (gdk_x_error) pending.
(gdb) run --sync --no-daemon
Starting program: /usr/bin/gnome-settings-daemon --sync --no-daemon
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0x7f6630439780 (LWP 25253)]
[Switching to Thread 0x7f6630439780 (LWP 25253)]

Breakpoint 1, gdk_x_error (display=0x1ff7f90, error=0x7fff38473220)
    at /build/buildd/gtk+2.0-2.16.1/gdk/x11/gdkmain-x11.c:613
	in /build/buildd/gtk+2.0-2.16.1/gdk/x11/gdkmain-x11.c
(gdb) bt full
#0  gdk_x_error (display=0x1ff7f90, error=0x7fff38473220)
    at /build/buildd/gtk+2.0-2.16.1/gdk/x11/gdkmain-x11.c:613
No locals.
#1  0x00007f662bc665b4 in _XError () from /usr/lib/libX11.so.6
No symbol table info available.
#2  0x00007f662bc6e06b in _XReply () from /usr/lib/libX11.so.6
No symbol table info available.
#3  0x00007f662c13b18d in XRRGetScreenSizeRange () from /usr/lib/libXrandr.so.2
No symbol table info available.
#4  0x00007f662773b715 in ?? () from /usr/lib/libgnome-desktop-2.so.11
No symbol table info available.
#5  0x00007f662773c567 in gnome_rr_screen_new ()
   from /usr/lib/libgnome-desktop-2.so.11
No symbol table info available.
#6  0x00007f662794e7c3 in gsd_xrandr_manager_start (manager=0x200a890, 
    error=0x7fff38473578) at gsd-xrandr-manager.c:1470
	__PRETTY_FUNCTION__ = "gsd_xrandr_manager_start"
#7  0x00007f662794c987 in impl_activate (plugin=0x2051e60)
    at gsd-xrandr-plugin.c:78
	res = <value optimized out>
	error = (GError *) 0x0
#8  0x0000000000405d72 in gnome_settings_plugin_info_activate ()
No symbol table info available.
#9  0x00000000004049a5 in ?? ()
No symbol table info available.
#10 0x00007f662d3530cd in g_slist_foreach () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#11 0x0000000000404baa in gnome_settings_manager_start ()
No symbol table info available.
#12 0x00000000004047a4 in main ()
No symbol table info available.
(gdb) q
The program is running.  Exit anyway? (y or n)