Browser page refresh - horizontal, flickering lines

[stevecook172001]

Please see below. It sound like you have compositing switched off.

Looking for advice preventing / fixing screen tearing 16.04

That sounds like compositing is off. go to system/preferences/look and feel/mate tweak click on the "windows" tab on the left hand side change window manager to "marco(compton GPU compositor)" on the right hand side [image] close Mate Tweak. Reopen firefox and go to a streaming video site and run a video. you should find screen tearing is gone