Comment 87 for bug 282387

Niklas's instructions in post #36 at https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/282387/comments/36 worked for me after going into standby and resuming.

I am using a Lenovo Thinkpad X61 Tablet.

The only steps additional steps I had to take was the installation of a few other dependencies including libtool and autoconf using the code:

sudo apt-get install libtool
sudo apt-get install autoconf