Does it blink often? Infrequently? Very fast? All over the whole screen, or just parts?
What operating system did you use before 16.04? Was it working OK?
What brand and model is your PC?
Please find the file /var/log/Xorg.0.log and attach it here.
Run this command in a terminal:
Code:
sudo dpkg -l | grep intel
and report the results. If among the results you see xserver-xorg-video-intel, you can try switching to a different driver by doing:
Code:
sudo apt-get purge xserver-xorg-video-intel
and restarting the X server or rebooting. If this does not resolve the problem, attach the newer Xorg.0.log file when you report your results.