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Re: N-key rollover keyboards (was: issue with keyboard input for multipl

From: Alan Davis
Subject: Re: N-key rollover keyboards (was: issue with keyboard input for multiple keys Ctrl-b / nkey rollover?)
Date: Sun, 2 Aug 2020 10:47:33 -0700

On Sun, Aug 2, 2020, 10:04 Dmitry Alexandrov <> wrote:

> Yuri Khan <>

> FWIW, N-key rollover is not really about USB or protocols; itʼs about
> circuit of the keyboard.
> It does matter, when you reconfigure modifiers in a human-friendly way,
> that is move one of the ‘controls’ (normally, the left one) closer to
> ‘space’ — under your thumb — (ctrl:swap_lalt_lctl setxkbmap(1) -option or
> equivalent).
> Then, on many ordinary keyboards few combinations, that are in use in
> Emacs, are indeed get ‘ghosted’.  And M-C-b with inner M- and C- is a very
> likely variant.
> Two-key chords can never be affected, of course.

'ghosted'?  Does this mean these apparently problematic combinations
require N-key rollover?

I am also using org-mode with several multiple-key chords.  I cannot
remember any instance where these have been a problem.



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