About 6 weeks ago (very approximately), I intermittently started to reach Lightdm with an inactive touchpad. I would have to reboot, sometimes more than once to get it back.

When I thought that it at stabilized, now I'm loosing the touchpad as I'm using Ubuntu to the point that it became unusable (Just lost it twice in 10 min with one reboot). I even have to use Win 7 to type this since the touchpad works perfectly under Windows. Has anyone any idea of what's happening and how to investigate/fix this?

Ubuntu 11.10 amd64, Acer 5253 Synaptics touchpad