After upgrading to 14.10 my touchpad has some problems. After I've been using it for a while it freezes randomly. Before I have some output in /dev/input/mice after freezing no output at all. It seems to happen only when I'm using Unity; with GNOME I have no problem so far.
I don't know where to start digging. Any idea?
I finally found the guilty package.
My laptop is a Dell Latitude E6330 which has a 12.04 ubuntu preinstalled that I kept updgrading periodically until 14.10 (until the touchpad started freezing).
The xinput --list relevant output was
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ GlidePoint Virtual Touchpad id=13 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
I just solved the problem thanks to the answer to this post How to configure glidepoint driver for touchpad?. I just uninstalled the glidepoint package which, I assume, comes from dell specific repositories http://dell.archive.canonical.com/ which only provides support for LTS versions.
sudo apt-get autoremove glidepoint
After that the touchpad didn't freeze again.
To make sure this kind of problems will not appear again I made a clean install to avoid using packages that might not been updated when upgrading.
This screen freeze while using touchpad might be related to your issue. Recently (post #171) a patch was submitted to fix a race condition in x server. It should eventually be published through the usual update mechanism.
These commands always work for me
sudo modprobe -r psmouse
sudo modprobe psmouse proto=imps
they remove mouse driver then reload it
