System info: (will be amended if any more info is asked for)
My laptop runs Xubuntu 12.10. As it has a Solid State Drive,
/var/log/apt are set to tmpfs in the
/etc/fstab file - in case this makes any difference.
My problem is quite simple. Approximately 50% of boot attempts end in the mouse cursor on a black screen (presumably LightDM failing to load), forcing me to restart and try again.
I can access the Ctrl+Alt+F1 terminal to reboot the machine, but it's very annoying having to shut down and reboot one, two or three times before successfully reaching the login screen. The error seems to be with LightDM, as I've tried five boots in a row with GDM and they've all gone fine.
Thanks for any help you can give.
Xorg.1.log after running xstart after failed boot: http://paste.ubuntu.com/1437249/