Here's my try to reproduce, exactly the same sequence... and no HUD :/
KeyPress event, serial 33, synthetic NO, window 0x4c00001, root 0xaf, subw 0x0, time 72005151, (1022,585), root:(1023,637), state 0x0, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False
KeyPress event, serial 33, synthetic NO, window 0x4c00001, root 0xaf, subw 0x0, time 72005311, (1022,585), root:(1023,637), state 0x8, keycode 113 (keysym 0xff51, Left), same_screen YES, XLookupString gives 0 bytes: XmbLookupString gives 0 bytes: XFilterEvent returns: False
KeyRelease event, serial 33, synthetic NO, window 0x4c00001, root 0xaf, subw 0x0, time 72005510, (1022,585), root:(1023,637), state 0x8, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES, XLookupString gives 0 bytes: XFilterEvent returns: False
KeyRelease event, serial 33, synthetic NO, window 0x4c00001, root 0xaf, subw 0x0, time 72005730, (1022,585), root:(1023,637), state 0x0, keycode 113 (keysym 0xff51, Left), same_screen YES, XLookupString gives 0 bytes: XFilterEvent returns: False
Here's my try to reproduce, exactly the same sequence... and no HUD :/
KeyPress event, serial 33, synthetic NO, window 0x4c00001,
root 0xaf, subw 0x0, time 72005151, (1022,585), root:(1023,637),
state 0x0, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 33, synthetic NO, window 0x4c00001,
root 0xaf, subw 0x0, time 72005311, (1022,585), root:(1023,637),
state 0x8, keycode 113 (keysym 0xff51, Left), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 33, synthetic NO, window 0x4c00001,
root 0xaf, subw 0x0, time 72005510, (1022,585), root:(1023,637),
state 0x8, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 33, synthetic NO, window 0x4c00001,
root 0xaf, subw 0x0, time 72005730, (1022,585), root:(1023,637),
state 0x0, keycode 113 (keysym 0xff51, Left), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False