some mouse events are lost

[Roger Peppe]

[Note this happens only when using the buttons and touchpoint on my Lenovo Thinkpad X220.
When I plug in an external mouse, I do not see the problem.]

- I cannot drag with the middle mouse button; it generates scroll events only.

- Chorded mouse clicks are lost (I use an application that reacts to specific combinations
of mouse buttons). For example, if I click, drag and continue to hold down the left mouse
button, then click the middle mouse button (while still holding down the left button),
that click is not delivered to my application.

This simple tcl/tk input to wish will demonstrate the problem:

bind . <ButtonPress-1> {puts "b1"}
bind . <ButtonPress-2> {puts "b2"}
bind . <ButtonRelease-1> {puts "b1r"}
bind . <ButtonRelease-2> {puts "b2r"}
bind . <ButtonPress-3> {puts "b3"}
bind . <ButtonRelease-3> {puts "b3r"}

This behaviour is not entirely consistent - *sometimes* I do see the chorded click.

[Omer Akram (om26er)]

the bug is not in unity or unity-2d I have moved the other bug to "ubuntu" distro.