Comment 6 for bug 807306

Hmm, from that list only the new linux-image seems likely. And that's easy enough to prove/disprove - reboot, hold down the left shift to bring up grub, and boot into a prior kernel version. If it works properly then, that points to the kernel.

The history.log is interesting, but the dpkg.log might have more. Could you attach /var/log/dpkg.log?

Neither of the udev messages look relevant to input problems, although udev could still be a suspect. Thanks for digging those messages out. That second one does need solved though. I think that's just failsafe-x, which doesn't work with lightdm yet.