Thanks Tim! So it looks like nouveau fails to work for you but from the log it appears to be starting up correctly. A few questions.. Can you switch VTs successfully when it fails? If so, does sudo service lightdm stop then sudo service lightdm start correct it? Do you see a mouse pointer or is it completely black after booting? Does raising the backlight bring it up? Is it possible you could attach the /var/log/Xorg.0.log{,.old} from the failed boot, or does it not even write one out?
Thanks Tim! So it looks like nouveau fails to work for you but from the log it appears to be starting up correctly. A few questions.. Can you switch VTs successfully when it fails? If so, does sudo service lightdm stop then sudo service lightdm start correct it? Do you see a mouse pointer or is it completely black after booting? Does raising the backlight bring it up? Is it possible you could attach the /var/log/ Xorg.0. log{,.old} from the failed boot, or does it not even write one out?