I have nvidia graphics and I have this exact issue. My pasted my lightdm.log here http://paste.ubuntu.com/1083887/
I find that just hittting enter at any point when the artifacts are present will cause lightdm to restart
I have nvidia graphics and I have this exact issue. paste.ubuntu. com/1083887/
My pasted my lightdm.log here http://
I find that just hittting enter at any point when the artifacts are present will cause lightdm to restart