It has been going on for a while but I do not remember exactly after which upgrade.
I am running awesome as a window manager for XFCE4. Whenever I connect to external monitors, or disconnect from them I issue xrandr commands e.g.
xrandr --output $LVDS --off
xrandr --fbmm 520x326 \
--output DP1 --same-as LVDS1 --mode 1920x1200 \
--output VGA1 --mode 1920x1200 --rotate left --right-of DP1 \
--output LVDS1 --off \
|| xrandr --output $LVDS --mode 1440x900
where LVDS is set to output of xrandr | awk '/LVDS/{print $1;}'
then some times (not always but often) xfce4-power-manager crashes with
the following traceback:
(gdb) bt
#0 XGrabServer (dpy=dpy@entry=0x0) at ../../src/GrServer.c:36
#1 0x00007ffff783ec08 in gtk_tray_icon_update_manager_window (icon=0x5555557f1020) at /tmp/buildd/gtk+2.0-2.24.20/gtk/gtktrayicon-x11.c:488
#2 0x00007ffff783ef0b in gtk_tray_icon_manager_filter (xevent=<optimized out>, event=<optimized out>, user_data=<optimized out>)
at /tmp/buildd/gtk+2.0-2.24.20/gtk/gtktrayicon-x11.c:398
#3 0x00007ffff712524d in gdk_event_apply_filters (filters=0x555555813340, event=<optimized out>, xevent=<optimized out>)
at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:356
#4 gdk_event_translate (display=display@entry=0x5555557ab020, event=event@entry=0x5555557d9c80, xevent=xevent@entry=0x7fffffffd890,
return_exposes=return_exposes@entry=0) at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:946
#5 0x00007ffff7126a68 in _gdk_events_queue (display=display@entry=0x5555557ab020) at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:2336
#6 0x00007ffff7126aee in gdk_event_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>)
at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:2397
#7 0x00007ffff633fea6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8 0x00007ffff63401f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9 0x00007ffff63405fa in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007ffff76b9257 in IA__gtk_main () at /tmp/buildd/gtk+2.0-2.24.20/gtk/gtkmain.c:1257
#11 0x000055555555bf7a in ?? ()
#12 0x000055555555c58b in main ()
here is a full one:
(gdb) bt full
#0 XGrabServer (dpy=dpy@entry=0x0) at ../../src/GrServer.c:36
No locals.
#1 0x00007ffff783ec08 in gtk_tray_icon_update_manager_window (icon=0x5555557f1020) at /tmp/buildd/gtk+2.0-2.24.20/gtk/gtktrayicon-x11.c:488
widget = 0x5555557f1020
screen = 0x0
display = 0x0
xdisplay = 0x0
#2 0x00007ffff783ef0b in gtk_tray_icon_manager_filter (xevent=<optimized out>, event=<optimized out>, user_data=<optimized out>)
at /tmp/buildd/gtk+2.0-2.24.20/gtk/gtktrayicon-x11.c:398
icon = <optimized out>
xev = <optimized out>
#3 0x00007ffff712524d in gdk_event_apply_filters (filters=0x555555813340, event=<optimized out>, xevent=<optimized out>)
at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:356
filter = <optimized out>
tmp_list = 0x555555813340
result = <optimized out>
#4 gdk_event_translate (display=display@entry=0x5555557ab020, event=event@entry=0x5555557d9c80, xevent=xevent@entry=0x7fffffffd890,
return_exposes=return_exposes@entry=0) at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:946
result = <optimized out>
window = 0x0
window_private = 0x0
filter_window = <optimized out>
window_impl = 0x0
return_val = 0
screen = 0x0
screen_x11 = 0x0
toplevel = 0x0
display_x11 = 0x5555557ab020
xwindow = <optimized out>
filter_xwindow = <optimized out>
#5 0x00007ffff7126a68 in _gdk_events_queue (display=display@entry=0x5555557ab020) at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:2336
node = 0x5555557d4e40
event = 0x5555557d9c80
xevent = {type = 33, xany = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, window = 134}, xkey = {type = 33,
serial = 117553, send_event = 1, display = 0x55555579c400, window = 134, root = 451, subwindow = 32, time = 0, x = 455, y = 0,
x_root = 12582916, y_root = 0, state = 0, keycode = 0, same_screen = 0}, xbutton = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, window = 134, root = 451, subwindow = 32, time = 0, x = 455, y = 0, x_root = 12582916, y_root = 0, state = 0,
button = 0, same_screen = 0}, xmotion = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, window = 134,
root = 451, subwindow = 32, time = 0, x = 455, y = 0, x_root = 12582916, y_root = 0, state = 0, is_hint = 0 '\000', same_screen = 0},
xcrossing = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, window = 134, root = 451, subwindow = 32, time = 0,
x = 455, y = 0, x_root = 12582916, y_root = 0, mode = 0, detail = 0, same_screen = 0, focus = 0, state = 0}, xfocus = {type = 33,
serial = 117553, send_event = 1, display = 0x55555579c400, window = 134, mode = 451, detail = 0}, xexpose = {type = 33,
serial = 117553, send_event = 1, display = 0x55555579c400, window = 134, x = 451, y = 0, width = 32, height = 0, count = 0},
xgraphicsexpose = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, drawable = 134, x = 451, y = 0, width = 32,
height = 0, count = 0, major_code = 0, minor_code = 455}, xnoexpose = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, drawable = 134, major_code = 451, minor_code = 0}, xvisibility = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, window = 134, state = 451}, xcreatewindow = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, parent = 134, window = 451, x = 32, y = 0, width = 0, height = 0, border_width = 455, override_redirect = 0},
xdestroywindow = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, event = 134, window = 451}, xunmap = {type = 33,
serial = 117553, send_event = 1, display = 0x55555579c400, event = 134, window = 451, from_configure = 32}, xmap = {type = 33,
serial = 117553, send_event = 1, display = 0x55555579c400, event = 134, window = 451, override_redirect = 32}, xmaprequest = {
type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, parent = 134, window = 451}, xreparent = {type = 33,
serial = 117553, send_event = 1, display = 0x55555579c400, event = 134, window = 451, parent = 32, x = 0, y = 0,
override_redirect = 455}, xconfigure = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, event = 134,
window = 451, x = 32, y = 0, width = 0, height = 0, border_width = 455, above = 12582916, override_redirect = 0}, xgravity = {
type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, event = 134, window = 451, x = 32, y = 0}, xresizerequest = {
type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, window = 134, width = 451, height = 0}, xconfigurerequest = {
type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, parent = 134, window = 451, x = 32, y = 0, width = 0, height = 0,
border_width = 455, above = 12582916, detail = 0, value_mask = 0}, xcirculate = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, event = 134, window = 451, place = 32}, xcirculaterequest = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, parent = 134, window = 451, place = 32}, xproperty = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, window = 134, atom = 451, time = 32, state = 0}, xselectionclear = {type = 33, serial = 117553,
send_event = 1, display = 0x55555579c400, window = 134, selection = 451, time = 32}, xselectionrequest = {type = 33, serial = 117553,
send_event = 1, display = 0x55555579c400, owner = 134, requestor = 451, selection = 32, target = 0, property = 455, time = 12582916},
xselection = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, requestor = 134, selection = 451, target = 32,
property = 0, time = 455}, xcolormap = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, window = 134,
colormap = 451, new = 32, state = 0}, xclient = {type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, window = 134,
message_type = 451, format = 32, data = {b = "\000\000\000\000\000\000\000\000\307\001\000\000\000\000\000\000\004\000\300", s = {0, 0,
0, 0, 455, 0, 0, 0, 4, 192}, l = {0, 455, 12582916, 0, 0}}}, xmapping = {type = 33, serial = 117553, send_event = 1,
display = 0x55555579c400, window = 134, request = 451, first_keycode = 0, count = 32}, xerror = {type = 33, display = 0x1cb31,
resourceid = 1, serial = 93824994624512, error_code = 134 '\206', request_code = 0 '\000', minor_code = 0 '\000'}, xkeymap = {
type = 33, serial = 117553, send_event = 1, display = 0x55555579c400, window = 134,
key_vector = "\303\001\000\000\000\000\000\000 ", '\000' <repeats 15 times>, "\307\001\000\000\000\000\000"}, xgeneric = {type = 33,
serial = 117553, send_event = 1, display = 0x55555579c400, extension = 134, evtype = 0}, xcookie = {type = 33, serial = 117553,
send_event = 1, display = 0x55555579c400, extension = 134, evtype = 0, cookie = 451, data = 0x20}, pad = {33, 117553, 1,
93824994624512, 134, 451, 32, 0, 455, 12582916, 0 <repeats 14 times>}}
xdisplay = 0x55555579c400
#6 0x00007ffff7126aee in gdk_event_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>)
at /tmp/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:2397
display = 0x5555557ab020
event = <optimized out>
#7 0x00007ffff633fea6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#8 0x00007ffff63401f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#9 0x00007ffff63405fa in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#10 0x00007ffff76b9257 in IA__gtk_main () at /tmp/buildd/gtk+2.0-2.24.20/gtk/gtkmain.c:1257
tmp_list = 0x0
functions = 0x0
init = <optimized out>
loop = 0x5555557f0900
#11 0x000055555555bf7a in ?? ()
No symbol table info available.
#12 0x000055555555c58b in main ()
No symbol table info available.