This was apparently reported on a system where Xorg *does* start, according to LightdmLog.txt. There is one error which looks fishy:
мая 07 15:49:00 hostname systemd[1]: var-lock.mount: Mount on symlink /var/lock not allowed. мая 07 15:49:00 hostname systemd[1]: var-lock.mount failed to run 'mount' task: Too many levels of symbolic links мая 07 15:49:00 hostname systemd[1]: Failed to mount /var/lock. мая 07 15:49:00 hostname systemd[1]: Dependency failed for Local File Systems. This sounds like an error in /etc/fstab, can you please attach this? This might be the whole cause, or just a side problem, there's not enough informatino here to know. If you are in the broken state, please log into a text console, and run this command: sudo journalctl > journal.txt then reboot with upstart and attach ~/journal.txt here. Thanks! ** Changed in: systemd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1452717 Title: Xorg doesn't start after upgrade from utopic to vivid, starts ok when chosen to boot upstart instead of systemd To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1452717/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs