GNU gdb (GDB) 7.0-ubuntu
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
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For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/gnome-settings-daemon...(no debugging symbols found)...done.
(gdb) break gdk_x_error
Function "gdk_x_error" not defined.
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
[Thread debugging using libthread_db enabled]
Xlib:  extension "Generic Event Extension" missing on display ":1000.0".
Xlib:  extension "Generic Event Extension" missing on display ":1000.0".
Xlib:  extension "Generic Event Extension" missing on display ":1000.0".
Xlib:  extension "Generic Event Extension" missing on display ":1000.0".
Xlib:  extension "Generic Event Extension" missing on display ":1000.0".

Breakpoint 1, gdk_x_error (display=0x634de0, error=0x7fffffffdcc0)
    at /build/buildd/gtk+2.0-2.18.2/gdk/x11/gdkmain-x11.c:438
438	/build/buildd/gtk+2.0-2.18.2/gdk/x11/gdkmain-x11.c: No such file or directory.
	in /build/buildd/gtk+2.0-2.18.2/gdk/x11/gdkmain-x11.c
(gdb) bt full
#0  gdk_x_error (display=0x634de0, error=0x7fffffffdcc0)
    at /build/buildd/gtk+2.0-2.18.2/gdk/x11/gdkmain-x11.c:438
No locals.
#1  0x00007ffff41b4414 in _XError (dpy=0x634de0, rep=0x6a2180)
    at ../../src/XlibInt.c:2924
        rtn_val = <value optimised out>
        event = {type = 0, xany = {type = 0, serial = 6508000, 
            send_event = 75497473, display = 0x7f, window = 562689}, xkey = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, root = 140737297608256, subwindow = 126, 
            time = 6508000, x = 6955392, y = 0, x_root = 1, y_root = 0, 
            state = 127, keycode = 0, same_screen = -193829108}, xbutton = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, root = 140737297608256, subwindow = 126, 
            time = 6508000, x = 6955392, y = 0, x_root = 1, y_root = 0, 
            state = 127, button = 0, same_screen = -193829108}, xmotion = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, root = 140737297608256, subwindow = 126, 
            time = 6508000, x = 6955392, y = 0, x_root = 1, y_root = 0, 
            state = 127, is_hint = 0 '\000', same_screen = -193829108}, 
          xcrossing = {type = 0, serial = 6508000, send_event = 75497473, 
            display = 0x7f, window = 562689, root = 140737297608256, 
            subwindow = 126, time = 6508000, x = 6955392, y = 0, x_root = 1, 
            y_root = 0, mode = 127, detail = 0, same_screen = -193829108, 
            focus = 32767, state = 6955360}, xfocus = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, mode = -190747072, detail = 32767}, xexpose = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, x = -190747072, y = 32767, width = 126, 
            height = 0, count = 6508000}, xgraphicsexpose = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            drawable = 562689, x = -190747072, y = 32767, width = 126, 
            height = 0, count = 6508000, major_code = 0, 
            minor_code = 6955392}, xnoexpose = {type = 0, serial = 6508000, 
            send_event = 75497473, display = 0x7f, drawable = 562689, 
            major_code = -190747072, minor_code = 32767}, xvisibility = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, state = -190747072}, xcreatewindow = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            parent = 562689, window = 140737297608256, x = 126, y = 0, 
            width = 6508000, height = 0, border_width = 6955392, 
            override_redirect = 0}, xdestroywindow = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            event = 562689, window = 140737297608256}, xunmap = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            event = 562689, window = 140737297608256, from_configure = 126}, 
          xmap = {type = 0, serial = 6508000, send_event = 75497473, 
            display = 0x7f, event = 562689, window = 140737297608256, 
            override_redirect = 126}, xmaprequest = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            parent = 562689, window = 140737297608256}, xreparent = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            event = 562689, window = 140737297608256, parent = 126, 
            x = 6508000, y = 0, override_redirect = 6955392}, xconfigure = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            event = 562689, window = 140737297608256, x = 126, y = 0, 
            width = 6508000, height = 0, border_width = 6955392, above = 1, 
            override_redirect = 127}, xgravity = {type = 0, serial = 6508000, 
            send_event = 75497473, display = 0x7f, event = 562689, 
            window = 140737297608256, x = 126, y = 0}, xresizerequest = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, width = -190747072, height = 32767}, 
          xconfigurerequest = {type = 0, serial = 6508000, 
            send_event = 75497473, display = 0x7f, parent = 562689, 
            window = 140737297608256, x = 126, y = 0, width = 6508000, 
            height = 0, border_width = 6955392, above = 1, detail = 127, 
            value_mask = 140737294526220}, xcirculate = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            event = 562689, window = 140737297608256, place = 126}, 
          xcirculaterequest = {type = 0, serial = 6508000, 
            send_event = 75497473, display = 0x7f, parent = 562689, 
            window = 140737297608256, place = 126}, xproperty = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, atom = 140737297608256, time = 126, 
            state = 6508000}, xselectionclear = {type = 0, serial = 6508000, 
            send_event = 75497473, display = 0x7f, window = 562689, 
            selection = 140737297608256, time = 126}, xselectionrequest = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            owner = 562689, requestor = 140737297608256, selection = 126, 
            target = 6508000, property = 6955392, time = 1}, xselection = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            requestor = 562689, selection = 140737297608256, target = 126, 
            property = 6508000, time = 6955392}, xcolormap = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, colormap = 140737297608256, new = 126, 
            state = 0}, xclient = {type = 0, serial = 6508000, 
            send_event = 75497473, display = 0x7f, window = 562689, 
            message_type = 140737297608256, format = 126, data = {
              b = "\340Mc\000\000\000\000\000\200!j\000\000\000\000\000\001\000\000", s = {19936, 99, 0, 0, 8576, 106, 0, 0, 1, 0}, l = {6508000, 6955392, 1, 
                127, 140737294526220}}}, xmapping = {type = 0, 
            serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, request = -190747072, first_keycode = 32767, 
            count = 126}, xerror = {type = 0, display = 0x634de0, 
            resourceid = 75497473, serial = 127, error_code = 1 '\001', 
            request_code = 150 '\226', minor_code = 8 '\b'}, xkeymap = {
            type = 0, serial = 6508000, send_event = 75497473, display = 0x7f, 
            window = 562689, 
            key_vector = "@n\241\364\377\177\000\000~\000\000\000\000\000\000\000\340Mc\000\000\000\000\000\200!j\000\000\000\000"}, pad = {0, 6508000, 
            75497473, 127, 562689, 140737297608256, 126, 6508000, 6955392, 1, 
            127, 140737294526220, 6955360, 140737288841566, 1, 
            140737488346464, 140737488346472, 0, 140737488346560, 6510624, 0, 
            0, 0, 6508000}}
        async = <value optimised out>
        next = 0x6a2180
#2  0x00007ffff41bafd6 in _XReply (dpy=0x634de0, rep=<value optimised out>, 
    extra=0, discard=0) at ../../src/xcb_io.c:506
        ext = 0x0
        ret_code = <value optimised out>
        error = 0x6a2180
        c = 0x635820
        __PRETTY_FUNCTION__ = "_XReply"
#3  0x00007ffff313a41d in ?? () from /usr/lib/libXrandr.so.2
No symbol table info available.
#4  0x00007fffef01c9c2 in fill_out_screen_info (screen=0x694da0, 
    needs_reprobe=<value optimised out>, error=<value optimised out>)
    at gnome-rr.c:379
        resources = <value optimised out>
#5  screen_info_new (screen=0x694da0, needs_reprobe=<value optimised out>, 
    error=<value optimised out>) at gnome-rr.c:470
        info = 0x694e00
        __PRETTY_FUNCTION__ = "screen_info_new"
#6  0x00007fffef01cda7 in gnome_rr_screen_new (gdk_screen=0x61b120, 
    callback=0x7fffef22f260 <on_randr_event>, data=0x646880, 
    error=0x7fffffffe058) at gnome-rr.c:633
        screen = 0x694da0
        dpy = 0x634de0
        event_base = 107
        ignore = 0
        __PRETTY_FUNCTION__ = "gnome_rr_screen_new"
#7  0x00007fffef230983 in gsd_xrandr_manager_start (manager=0x646880, 
    error=0x7fffffffe058) at gsd-xrandr-manager.c:1899
        __PRETTY_FUNCTION__ = "gsd_xrandr_manager_start"
#8  0x00007fffef22dcc7 in impl_activate (plugin=0x69a410)
    at gsd-xrandr-plugin.c:78
        res = <value optimised out>
        error = 0x0
#9  0x0000000000405cdd in gnome_settings_plugin_info_activate ()
No symbol table info available.
#10 0x0000000000404975 in ?? ()
No symbol table info available.
#11 0x00007ffff4c8c53c in g_slist_foreach () from /lib/libglib-2.0.so.0
No symbol table info available.
#12 0x000000000040537c in gnome_settings_manager_start ()
No symbol table info available.
#13 0x0000000000404771 in main ()
No symbol table info available.
(gdb) cont
Continuing.
The program 'gnome-settings-daemon' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadRequest (invalid request code or no such operation)'.
  (Details: serial 127 error_code 1 request_code 150 minor_code 8)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

Program exited with code 01.
(gdb) bt full
No stack.
(gdb) eexit
Undefined command: "exit".  Try "help".
(gdb) q