The error prevents lightdm/X from starting. I have Ubuntu with classic Unity, upgraded from 14.10/15.04. I have 13-inch Macbook with Intel-only graphics.
INTERESTING OBSERVATIONS:
1. When I then log in as root on pty1 and execute "service lightdm restart", X starts without a problem.
2. When I boot with upstart rather than systemd (second entry in grub), X starts without a problem.
The error prevents lightdm/X from starting. I have Ubuntu with classic Unity, upgraded from 14.10/15.04. I have 13-inch Macbook with Intel-only graphics.
INTERESTING OBSERVATIONS:
1. When I then log in as root on pty1 and execute "service lightdm restart", X starts without a problem.
2. When I boot with upstart rather than systemd (second entry in grub), X starts without a problem.