Also had this problem, fixed after dist-upgrade and reinstalling ubuntu- desktop.
-- 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/1288903 Title: Cannot login to lightdm after upgrade to trusty Status in “lightdm” package in Ubuntu: Invalid Bug description: Even after applying the update for lightdm in -proposed I still cannot login to lightdm after the upgrade. /var/log/lightdm/lightdm.log provides the following : [+11.69s] DEBUG: Session pid=1932: Prompt greeter with 1 message(s) [+14.82s] DEBUG: User /org/freedesktop/Accounts/User1000 changed [+17.48s] DEBUG: Session pid=1932: Continue authentication [+17.51s] DEBUG: Session pid=2856: Authentication complete with return value 0: Success [+17.51s] DEBUG: Session pid=1932: Authenticate result for user caribou: Success [+17.51s] DEBUG: Session pid=1932: User caribou authorized [+17.53s] DEBUG: Session pid=1932: Greeter requests session ubuntu [+17.53s] DEBUG: Seat: Failed to find session configuration ubuntu [+17.53s] DEBUG: Seat: Can't find session 'ubuntu' Content of /var/log/lightdm will be attached to the bug To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1288903/+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
