Ubuntu
xserver-xorg-input-evdev package

  1. Bug #54191
  2. Comment #22

Comment 22 for bug 54191

Revision history for this message
In , Alan Coopersmith (alan-coopersmith) wrote :

Sounds like the default mode of having 3rd button emulation mode on "auto",
in which case it's disabled the first time an actual third (middle) button
is pressed, but until then it has to wait for the timeout on presses of
either button 1 (left) or button 2 (right) to see if you'll hit the other
one fast enough to trigger the button 3 emulation.

You should be able to "fix" by changing the configuration of mice that
actually have 3 buttons to disable 3rd button emulation, though I'm not
up-to-date on how to do that with udev/evdev.