KeyRelease event, serial 32, synthetic NO, window 0x3400001,
root 0x4c, subw 0x0, time 4572520, (76,-12), root:(683,550),
state 0x50, keycode 115 (keysym 0xff67, Super_L), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False