My german keyboard has a key [AltGr], which I need to enter certain special chars. The Pipe sign ("|") is to be entered with [AltGr]+[><|].
The "[Menu]" key shows an icon with a context menu and a mouse pointer. It is located right next to [AltGr] on my notebook and a menu pops up, when I press the key. Unconveniently, you can't close the popup-menu by hitting [Menu] again, you have to use [ESC] instead.
I wanted to turn off the Menu key and found a nice tutorial, which helped me. Basically you run:
xev
to see all events listed and press the key you are looking for the code of (You will probably see more than just those two sections):
- [Menu] -
KeyPress event, serial 31, synthetic NO, window 0x3200001,
root 0x67, subw 0x0, time 66973474, (176,-10), root:(184,38),
state 0x0, keycode 135 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
XKeysymToKeycode returns keycode: 92
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 34, synthetic NO, window 0x3200001,
root 0x67, subw 0x0, time 66973595, (176,-10), root:(184,38),
state 0x80, keycode 135 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
XKeysymToKeycode returns keycode: 92
XLookupString gives 0 bytes:
XFilterEvent returns: False
In my case, the following code line disabled the Menu key:
xmodmap -e "keycode 135 = 0x0000"
You can even have both keys acting as [AltGr], by assigning the keysym of [AltGr] to [Menu]:
- [AltGr] -
KeyPress event, serial 34, synthetic NO, window 0x3000001,
root 0x67, subw 0x0, time 65469481, (782,331), root:(790,379),
state 0x0, keycode 108 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
XKeysymToKeycode returns keycode: 92
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
xmodmap -e "keycode 135 = 0xfe03"