backtrace: Breakpoint 3, 0xb6fc3f66 in _XError () from /usr/lib/i386-linux-gnu/libX11.so.6 (gdb) bt #0 0xb6fc3f66 in _XError () from /usr/lib/i386-linux-gnu/libX11.so.6 #1 0xb6fc10ea in ?? () from /usr/lib/i386-linux-gnu/libX11.so.6 #2 0xb6fc1ca5 in _XReply () from /usr/lib/i386-linux-gnu/libX11.so.6 #3 0xb651bc8b in XGrabDevice () from /usr/lib/i386-linux-gnu/libXi.so.6 #4 0xb73aa931 in ?? () from /usr/lib/libgdk-x11-2.0.so.0 #5 0xb7397c63 in ?? () from /usr/lib/libgdk-x11-2.0.so.0 #6 0xb7378d41 in gdk_pointer_grab () from /usr/lib/libgdk-x11-2.0.so.0 #7 0x081de10a in sp_canvas_item_grab (item=0x9d1a120, event_mask=3844, cursor=0x0, etime=1266439) at display/sp-canvas.cpp:556 #8 0x0858705c in sp_select_context_root_handler (event_context=0x9d17a20, event=0xa599940) at select-context.cpp:509 #9 0x0808dea7 in sp_event_context_virtual_root_handler ( event_context=0x9d17a20, event=0xa599940) at event-context.cpp:965 #10 0x08518357 in sp_desktop_root_handler (event=0xa599940, desktop=0x8fe9db0) at desktop-events.cpp:71 #11 0x08248418 in sp_marshal_BOOLEAN__POINTER (closure=0x9d78778, return_value=0xbfffef1c, n_param_values=2, param_values=0xa5a80c8, invocation_hint=0xbfffedd0, marshal_data=0x0) at helper/sp-marshal.cpp:124 #12 0xb6d76372 in g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #13 0xb6d89048 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 ---Type to continue, or q to quit--- #14 0xb6d918d7 in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #15 0xb6d91cc2 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #16 0x081dcf85 in emit_event (canvas=0xbfffefb4, event=0xa5980f8) at display/sp-canvas.cpp:1376 #17 0xb7595a04 in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #18 0xb6d74cc7 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #19 0xb6d76372 in g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #20 0xb6d88e45 in ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #21 0xb6d918d7 in g_signal_emit_valist () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #22 0xb6d91cc2 in g_signal_emit () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0 #23 0xb76ca836 in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #24 0xb7593b8d in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0 #25 0xb75941af in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0 #26 0xb738fa0a in ?? () from /usr/lib/libgdk-x11-2.0.so.0 #27 0xb6cc4aa8 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0 ---Type to continue, or q to quit--- #28 0xb6cc5270 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0 #29 0xb6cc592b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0 #30 0xb7592c39 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0 #31 0xb7bae357 in Gtk::Main::run_impl() () from /usr/lib/libgtkmm-2.4.so.1 #32 0xb7baed42 in Gtk::Main::run() () from /usr/lib/libgtkmm-2.4.so.1 #33 0x08083183 in sp_main_gui (argc=1, argv=0xbffff7a4) at main.cpp:978 #34 0x08084900 in main (argc=2, argv=0xbffff7a4) at main.cpp:709 (gdb) frame 7 #7 0x081de10a in sp_canvas_item_grab (item=0x9d1a120, event_mask=3844, cursor=0x0, etime=1266439) at display/sp-canvas.cpp:556 556 NULL, cursor, etime); (gdb) info frame Stack level 7, frame at 0xbfffea10: eip = 0x81de10a in sp_canvas_item_grab (display/sp-canvas.cpp:556); saved eip 0x858705c called by frame at 0xbfffebd0, caller of frame at 0xbfffe9d0 source language c++. Arglist at 0xbfffea08, args: item=0x9d1a120, event_mask=3844, cursor=0x0, etime=1266439 Locals at 0xbfffea08, Previous frame's sp is 0xbfffea10 Saved registers: ebx at 0xbfffe9fc, ebp at 0xbfffea08, esi at 0xbfffea00, edi at 0xbfffea04, eip at 0xbfffea0c