> > (b) Restrict allowed hotkeys to modifier key(s) plus one
> > non-modifier key. Forwarding modifier keydown+keyup
> > to the guest has typically effects inside the guest,
> > so we only have to hold back that single non-modifier
> > key. That is alot easier to implement.
> Sorry but I was using this patch to make my ungrab key F15.
> This key is not used by anything and makes things so simple
> for me. Requiring a modifier key in the sequence seems unnecessary.
Just a plain F15 without any modifier should be find too.
Allowing *two* (or more) non-modifier keys (i.e. F14+F15) is where it
becomes tricky ...