> > (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 ...


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