[ubuntu] Touchpad stopped workng after dist-upgrade

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http://ubuntuforums.org – After dist-upgrade, the touchpad stopped workng in my laptop. The cursor is stationary in the middle, neither the red button mouse in the keyboard or the touchpad are responding at all, but the external mouse works. I even reinstalled Synaptics, but to no avail. Could it be a hardware problem of a software problem? (Hardware)