Comment 9 for bug 709977

for the downgrading part: it really helps.

Here is how i did it:

wgetted the package from https://launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/1:2.3.2-6ubuntu3b1/+buildjob/2109048

and sudo dpkg -i xserver-xorg-input-evdev_2.3.2-6ubuntu3b1_amd64.deb