Comment 351 for bug 1218322

@Vladyslav: did you have that g-s-d issue before updating?

Could you get a gdb backtrace of the issue?
$ sudo apt-get install libgtk-3-0-dbg
$ export GDK_SYNCHRONIZE=1
$ gdb gnome-settings-daemon
(gdb) b gdk_x_error
(gdb) r --replace
... it should stop on the issue
(gdb) bt