When this happens switch to TTY1 (Ctrl+Alt+F1) and restart lightdm.
sudo systemctl restart lightdm
Unity 8 should start after this.
There is another bug reported about this issue. Either mark that other one (Bug #1539811) as duplicate or this one.
When this happens switch to TTY1 (Ctrl+Alt+F1) and restart lightdm.
sudo systemctl restart lightdm
Unity 8 should start after this.
There is another bug reported about this issue. Either mark that other one (Bug #1539811) as duplicate or this one.