--- stack trace ---
#0  gnome_rr_screen_get_dpms_mode (screen=screen@entry=0x0, mode=mode@entry=0x7fff88f73b4c, error=error@entry=0x7fff88f73b88) at gnome-rr.c:1157
        enabled = 0 '\000'
        state = <optimized out>
        ret = 0
        __PRETTY_FUNCTION__ = "gnome_rr_screen_get_dpms_mode"
#1  0x00007fd77f0f07b0 in gnome_rr_screen_set_dpms_mode (screen=0x0, mode=mode@entry=GNOME_RR_DPMS_ON, error=error@entry=0x7fff88f73b88) at gnome-rr.c:1241
        state = 0
        ret = <optimized out>
        current_mode = <optimized out>
        __PRETTY_FUNCTION__ = "gnome_rr_screen_set_dpms_mode"
#2  0x00007fd7759b3d07 in idle_set_mode (manager=manager@entry=0xe52050, mode=mode@entry=GSD_POWER_IDLE_MODE_NORMAL) at gsd-power-manager.c:3026
        ret = 0
        error = 0x0
        idle_percentage = <optimized out>
        action_type = <optimized out>
        state = <optimized out>
#3  0x00007fd7759b42b0 in idle_evaluate (manager=0xe52050) at gsd-power-manager.c:3196
No locals.
#4  0x00007fd77e4b4353 in _g_closure_invoke_va (closure=0xf1ba00, return_value=0x0, instance=0xe5ac40, args=0x7fff88f73eb8, n_params=0, param_types=0x0) at /build/buildd/glib2.0-2.33.1/./gobject/gclosure.c:840
        marshal = 0x7fd77e4b5f60 <g_cclosure_marshal_VOID__VOIDv>
        marshal_data = 0x0
        in_marshal = <optimized out>
        real_closure = 0xf1b9e0
        __PRETTY_FUNCTION__ = "_g_closure_invoke_va"
#5  0x00007fd77e4cdaf8 in g_signal_emit_valist (instance=0xe5ac40, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fff88f73eb8) at /build/buildd/glib2.0-2.33.1/./gobject/gsignal.c:3207
        return_accu = <optimized out>
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        accumulator = 0x0
        emission = {next = 0x0, instance = 0xe5ac40, ihint = {signal_id = 201, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 15842160}
        signal_id = <optimized out>
        instance_type = <optimized out>
        emission_return = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        rtype = 4
        static_scope = 0
        closure = 0xf1ba00
        run_type = <optimized out>
        hlist = 0x0
        l = <optimized out>
        fastpath = 4
        instance_and_params = <optimized out>
        signal_return_type = <optimized out>
        param_values = <optimized out>
        node = 0xe91860
        i = <optimized out>
        n_params = <optimized out>
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#6  0x00007fd77e4ce232 in g_signal_emit (instance=instance@entry=0xe5ac40, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.33.1/./gobject/gsignal.c:3352
        var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff88f73f90, reg_save_area = 0x7fff88f73ed0}}
#7  0x00007fd7759ae3dc in gpm_idletime_alarm_reset_all (idletime=<optimized out>) at gpm-idletime.c:181
        i = <optimized out>
        alarm_item = 0xf1b930
#8  gpm_idletime_alarm_reset_all (idletime=0xe5ac40) at gpm-idletime.c:156
No locals.
#9  0x00007fd7759ae5b0 in gpm_idletime_set_reset_alarm (idletime=<optimized out>, alarm_event=<optimized out>) at gpm-idletime.c:234
        overflow = 32727
        add = {hi = -1, lo = 0}
        current = <optimized out>
        alarm_item = 0xe92720
#10 gpm_idletime_event_filter_cb (gdkxevent=<optimized out>, event=<optimized out>, data=0xe5ac40) at gpm-idletime.c:286
        alarm_item = 0x7fff88f73b4c
        xevent = <optimized out>
        idletime = 0xe5ac40
#11 0x00007fd77cf4dee1 in gdk_event_apply_filters (xevent=xevent@entry=0x7fff88f74060, event=event@entry=0xe27ad0, window=window@entry=0x0) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkeventsource.c:81
        filter = 0xf1b960
        node = <optimized out>
        tmp_list = 0xe92720
        result = <optimized out>
#12 0x00007fd77cf4e0b7 in gdk_event_source_translate_event (xevent=0x7fff88f74060, event_source=0xe1adf0) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkeventsource.c:195
        filter_window = 0x0
        dpy = 0xdfd030
        event = 0xe27ad0
        result = GDK_FILTER_CONTINUE
        event_translator = <optimized out>
#13 _gdk_x11_display_queue_events (display=0xe0a010) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkeventsource.c:332
        event = 0xe27ad0
        xevent = {type = 96, xany = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620}, xkey = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, root = 0, subwindow = 128844723912704, time = 115144, x = 0, y = 0, x_root = 15281168, y_root = 0, state = 2113451896, keycode = 32727, same_screen = 32}, xbutton = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, root = 0, subwindow = 128844723912704, time = 115144, x = 0, y = 0, x_root = 15281168, y_root = 0, state = 2113451896, button = 32727, same_screen = 32}, xmotion = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, root = 0, subwindow = 128844723912704, time = 115144, x = 0, y = 0, x_root = 15281168, y_root = 0, state = 2113451896, is_hint = -41 '\327', same_screen = 32}, xcrossing = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, root = 0, subwindow = 128844723912704, time = 115144, x = 0, y = 0, x_root = 15281168, y_root = 0, mode = 2113451896, detail = 32727, same_screen = 32, focus = 0, state = 48}, xfocus = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, mode = 0, detail = 0}, xexpose = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, x = 0, y = 0, width = 0, height = 29999, count = 115144}, xgraphicsexpose = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, drawable = 8388620, x = 0, y = 0, width = 0, height = 29999, count = 115144, major_code = 0, minor_code = 0}, xnoexpose = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, drawable = 8388620, major_code = 0, minor_code = 0}, xvisibility = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, state = 0}, xcreatewindow = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, parent = 8388620, window = 0, x = 0, y = 29999, width = 115144, height = 0, border_width = 0, override_redirect = 0}, xdestroywindow = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, event = 8388620, window = 0}, xunmap = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, event = 8388620, window = 0, from_configure = 0}, xmap = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, event = 8388620, window = 0, override_redirect = 0}, xmaprequest = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, parent = 8388620, window = 0}, xreparent = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, event = 8388620, window = 0, parent = 128844723912704, x = 115144, y = 0, override_redirect = 0}, xconfigure = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, event = 8388620, window = 0, x = 0, y = 29999, width = 115144, height = 0, border_width = 0, above = 15281168, override_redirect = 2113451896}, xgravity = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, event = 8388620, window = 0, x = 0, y = 29999}, xresizerequest = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, width = 0, height = 0}, xconfigurerequest = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, parent = 8388620, window = 0, x = 0, y = 29999, width = 115144, height = 0, border_width = 0, above = 15281168, detail = 2113451896, value_mask = 32}, xcirculate = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, event = 8388620, window = 0, place = 0}, xcirculaterequest = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, parent = 8388620, window = 0, place = 0}, xproperty = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, atom = 0, time = 128844723912704, state = 115144}, xselectionclear = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, selection = 0, time = 128844723912704}, xselectionrequest = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, owner = 8388620, requestor = 0, selection = 128844723912704, target = 115144, property = 0, time = 15281168}, xselection = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, requestor = 8388620, selection = 0, target = 128844723912704, property = 115144, time = 0}, xcolormap = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, colormap = 0, new = 0, state = 29999}, xclient = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, message_type = 0, format = 0, data = {b = "\310\301\001", '\000' <repeats 13 times>, "\020", <incomplete sequence \351>, s = {-15928, 1, 0, 0, 0, 0, 0, 0, 11280, 233}, l = {115144, 0, 15281168, 140563508148088, 32}}}, xmapping = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, request = 0, first_keycode = 0, count = 0}, xerror = {type = 96, display = 0x36d, resourceid = 0, serial = 14667824, error_code = 12 '\f', request_code = 0 '\000', minor_code = 128 '\200'}, xkeymap = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, window = 8388620, key_vector = '\000' <repeats 12 times>, "/u\000\000\310\301\001", '\000' <repeats 12 times>}, xgeneric = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, extension = 8388620, evtype = 0}, xcookie = {type = 96, serial = 877, send_event = 0, display = 0xdfd030, extension = 8388620, evtype = 0, cookie = 0, data = 0x752f00000000}, pad = {140561394696288, 877, 0, 14667824, 8388620, 0, 128844723912704, 115144, 0, 15281168, 140563508148088, 32, 48, 15840688, 332383224070416, 1, 0, 222, 593, 15281168, 140563508148088, 32, 48, 15840768}}
        xdisplay = 0xdfd030
        event_source = 0xe1adf0
        display_x11 = 0xe0a010
#14 0x00007fd77cf24e41 in gdk_display_get_event (display=display@entry=0xe0a010) at /build/buildd/gtk+3.0-3.4.2/./gdk/gdkdisplay.c:310
        __PRETTY_FUNCTION__ = "gdk_display_get_event"
#15 0x00007fd77cf4ddf2 in gdk_event_source_dispatch (source=source@entry=0xe1adf0, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkeventsource.c:354
        display = 0xe0a010
        event = <optimized out>
#16 0x00007fd77e1f6835 in g_main_dispatch (context=0xe1be00) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:2539
        dispatch = 0x7fd77cf4dde0 <gdk_event_source_dispatch>
        was_in_call = 0
        user_data = 0x0
        callback = 0
        cb_funcs = 0x0
        cb_data = 0x0
        current_source_link = {data = 0xe1adf0, next = 0x0}
        need_destroy = <optimized out>
        source = 0xe1adf0
        current = 0xe35960
        i = <optimized out>
#17 g_main_context_dispatch (context=context@entry=0xe1be00) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3075
No locals.
#18 0x00007fd77e1f6b68 in g_main_context_iterate (context=0xe1be00, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3146
        max_priority = 2147483647
        timeout = 1670
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x1133320
#19 0x00007fd77e1f6f62 in g_main_loop_run (loop=0xfda870) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3340
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#20 0x00007fd77ebcec65 in gtk_main () at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkmain.c:1165
        loop = 0xfda870
#21 0x0000000000403861 in main (argc=1, argv=0x7fff88f743c8) at main.c:464
        res = <optimized out>
        error = 0x0
ubuntu@ubuntu:~$