[Tuomo Valkonen] > The keycode for Alt_L is 0x40. xmodmap also reports two mappings > keycode 64 = Alt_L Meta_L > keycode 125 = Alt_L > > and only XGetModifierMapping uses the incorrect one, causing at least > some programs to not ignore alt presses/releases as they should. This has been fixed in -6, can you please confirm? Denis