I updated my computers Saturday night (nightowl) and my Asus laptop with hybrid gpus (nvidia/intel optimus-manager) will not boot into graphical interface after that. Lightdm starts and stops, starts and stops and so on and finally stops. I can get to tty but just for a few seconds and then I get thrown back. After a few reboots I could get to tty and disable lightdm. I then enabled lxdm but got into worse problems! Now lxdm starts and stops (and so on) but also samba will not start.
I am not so familiar with hybrid gpus so I wonder if anyone has a similar experience?