After updating my kernel to the latest 3.5.0-18-generic, I have no mouse or keyboard input. It just sits at the login screen. Not even the power button works, I have to hold down to power button for 5 seconds and force a shutdown. If I boot up to the previous kernel, however, everything is fine.

Now that I have updated my kernel once through "apt-get upgrade", I can't seem to do it again, so every time since then I have been purging and reinstalling linux-image-3.5.0-18-generic as well as linux-headers-3.5.0-18-generic. Each time with the same result, no mouse or keyboard input.

Hopefully someone has experienced this before?
Thanks.