I fixed the problem by installing xserver-xorg-input-all.
Since this pulls in xserver-xorg-input-evdev, I suspect that this was the problem, as this package was not installed. It must have been somehow uninstalled during the upgrade.
I fixed the problem by installing xserver- xorg-input- all.
Since this pulls in xserver- xorg-input- evdev, I suspect that this was the problem, as this package was not installed. It must have been somehow uninstalled during the upgrade.