Comment 1 for bug 1463664

I have the same issue. I lock the screen, if I mediately move the mouse i get the lock screen and can type my password to login. If I leave for while and come back, just black screen with flickering line in top left corner. From today if I press super+l I mediately get black screen with flickering line and have to reboot. Alt+F1 flashes cli login and back to blck screen, then stuck again and have to reboot or hold alt+crtl+del for reboot.