Comment 2 for bug 1222848

StacktraceTop:
 __pthread_mutex_unlock_usercnt (mutex=0x7475700073754244, decr=decr@entry=1) at pthread_mutex_unlock.c:37
 __GI___pthread_mutex_unlock (mutex=<optimized out>) at pthread_mutex_unlock.c:297
 g_mutex_unlock (mutex=<optimized out>) at /build/buildd/glib2.0-2.37.6/./glib/gthread-posix.c:232
 g_main_loop_run (loop=0x1529fb0) at /build/buildd/glib2.0-2.37.6/./glib/gmain.c:3908
 indicator_keyboard_service_up (self=<optimized out>) at main.c:373