While using Ubuntu 16.04 there was a unique issue we faced. The blue screen of death. Yes that is common in windows system, but here in Linux too we had similar issue
So here is how it looks like
Well, the issue is not some hardware issue. It seems some packages are broken
We fixed this by rebooting. After login once we get the blue screen, I switched to a terminal ctrl+alt+f1 and then running
sudo apt-get upgrade
This worked out for us. We simply rebooted and things were working properly as before.
In some cases, the above might not run, then the following command is suggested to be used to fix it.
sudo dpkg --configure -a