This also happened to me on an upgrade from Oneiric to Precise Alpha2. I switched to GDM to get my system working at the time.
Purging lightdm did not work, as the originally reported, I had to manually delete the files in /var/lib/lightdm. -- 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/887316 Title: /var/lib/lightdm files owned by invalid user after reinstall Status in “lightdm” package in Ubuntu: Confirmed Bug description: While I was trying out different display managers, I removed, then removed completely and then later reinstalled lightdm. This ended up changing the user id of lightdm. However, the dot files in /var/lib/lightdm were still owned by the old, now invalid user id and so lightdm could not read them. lightdm now did not start because it couldn't open its .Xauthority file. I fixed this by removing all the dot files in the /var/lib/lightdm directory and then letting lightdm recreate them. It looks like the "remove completely" option should remove the dot files in /var/lib/lightdm so they will be recreated with the correct userid if lightdm is reinstalled at a later date. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/887316/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
