Wierd. Just ran into this again. Haven't had USC installled for a while and suddly lightdm stopped working.
-- 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/1263533 Title: Cannot start without unity-system-compositor Status in “lightdm” package in Ubuntu: New Bug description: I can only start lightdm when usc is installed. I already tried purging lightdm but still no difference. Even manually executing "sudo start lightdm" doesn't work. However, I can still call "startx" and get an xsession running. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.9.5-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-0.9-generic 3.13.0-rc4 Uname: Linux 3.13.0-0-generic x86_64 ApportVersion: 2.12.7-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Sun Dec 22 20:56:30 2013 EcryptfsInUse: Yes InstallationDate: Installed on 2011-05-12 (954 days ago) InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) SourcePackage: lightdm UpgradeStatus: Upgraded to trusty on 2013-11-11 (41 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1263533/+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