Weird mouse behaviour

[Michael Gmelin]

On Mon, 27 Apr 2020 08:28:50 +0000
"Poul-Henning Kamp" <phk at phk.freebsd.dk> wrote:

> --------
> In message <65670198-e725-5b66-646c-5b147c943cd9 at daemonic.se>, Niclas
> Zeising writes:
> 
> >With my touchpad, ctrl left click and ctrl right click opens two 
> >different menus in xterm, main menu and vt font menu, respectively.  
> 
> ctrl-middle should open "VT Options" 
> 

I could reproduce this on my laptop and found the fix.

The problem is, that the middle mouse button only generates a key
press/key release event pair once its released (can be seen using xev
and `libinput debug-events').

This is caused by the trackpoint driver using one-button scrolling by
default (that is, you can hold the middle mouse button and move the
trackpoint - even though this didn't work for me).

You can disable on-button scrolling using xinput, e.g.

xinput set-prop 'TPPS/2 IBM TrackPoint' \
  'libinput Scroll Method Enabled' 0 0 0

After this, Ctrl+middle works as expected in xterm.

Note: Check `xinput' output to get the correct device name for your
trackpoint (you can also use its numeric identifier, but the name is
supposed to be more stable).

Cheers,
Michael

p.s. I also learned that using the trackpoint and the trackpad in
parallel (and thus having buttons) works okay now - it didn't when I
configured that laptop two years ago - \o/

-- 
Michael Gmelin