[BRLTTY] Key combinations not (yet?) handled by the Linux virtual console

[Aura Kelloniemi]

Hi list,

On 2025-11-24 at 16:14 -0500, Nicolas Pitre <nico at fluxnic.net> wrote:
 > On Mon, 24 Nov 2025, Sébastien Hinderer wrote:
 > > It seems the virtual consoles do not (yet?) have the capacity to
 > > distinguish e.g. Enter from Contro-Enter,

 > It does. Try this:

 > $ cat > ~/ctrl-enter.map << EOF
 > control keycode 28 = F100
 > string F100 = "foobar"
 > EOF

 > $ sudo loadkeys ~/ctrl-enter.map

I think the problem is more comp/lex than this. If I run the above commands,
CTRL+Enter really is mapped to function key F100, which produces "foobar", but
"foobar" will not be recognized by any application as a press of CTRL+Enter.

Would you mind taking a look at this:
http://www.leonerd.org.uk/hacks/fixterms/

It is a non-comprehensive description of the "CSI u" mode which many modern
terminal emulators, like xterm, kitty, alacritty and iTerm2 support.

If Linux console supported this mode, it would make a huge number of new key
combinations available to users, mostly without any configuration.

-- 
Aura