Xev prints this when I press
KeyRelease event, serial 33, synthetic NO, window 0x1800001,
root 0x99, subw 0x0, time 10692171, (-627,330), root:(562,580),
state 0x0, keycode 232 (keysym 0x1008ff03, XF86MonBrightnessDown),
same_scre
en YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 33, synthetic NO, window 0x1800001,
root 0x99, subw 0x0, time 10795280, (-562,236), root:(627,486),
state 0x0, keycode 233 (keysym 0x1008ff02, XF86MonBrightnessUp),
same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
