After a surprising 5 successful restarts with 'sleep 6' added into /etc/init/lighdm.conf file, I thought that some recent updates might have fixed it. I've kept an eye on the updates that were being applied and they don't look to be related but hey, the proof was in the pudding - five successful restarts.
I then commented out the 'sleep 6' and Lightdm is back to being a recalcitrant and not starting. Adding 'sleep 6' back in got it going again. I suspect that after my hybrid HDD starts caching again that it will break due to some race condition. For me previously, it sometime wont even start when I execute 'sudo lightdm' from the command-line. When it fails after trying to manually start it, I have a series of about 20 "Error writing to daemon: Broken pipe" messages appear on the console. I've attached my /var/log/lightdm/x-0-greeter.log file. It looks as if the broken pipe message may have some relationship to DBUS. ** Attachment added: "Errors in x-0-greeter.log" https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1066410/+attachment/3439688/+files/x-0-greeter.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/1066410 Title: lightdm doesn't load correctly on Ubuntu 12.10 Status in “lightdm” package in Ubuntu: Confirmed Bug description: Ubuntu 12.10 doesn't load correctly because lightdm shows only a mouse pointer and a blinking command-line cursor. I don't know if this is only Ubuntu 12.10 specific bug, because a similar error appeared on my friend's computer back in 2011 on Ubuntu 11.10. However, switching to a command line and restarting lightdm solves the problem per instance. Also rebooting the device solves it, but also only for the specific boot. Another reboot ends with the same "black screen with a working mouse pointer and a blinking cursor". I am using Asus Zenbook ux32vd (Intel HD Graphics 4000 + not used Nvidia GT620M - Optimus technology). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1066410/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp