16.04 - How To Purge Intel Default Drivers & Reinstall Intel Graphic Drivers
I had a similar issue, and this worked for me:
sudo apt-get update
sudo apt-get install --reinstall xserver-xorg-video-intel xserver-xorg-core
sudo dpkg-reconfigure xserver-xorg
Followed by a reboot. Was having many irritating graphics crashes before, none since. It oddly didn't make Ubuntu recognise the device, but at least I'm not getting crashes now.
Adapted from original solution here.