Marking this as fixed. The user said a reinstall fixed it and the guest session has been working fine for a long time. Please file a new bug if you are still having issues.
** Changed in: lightdm (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/870373 Title: guest session will not open Status in “lightdm” package in Ubuntu: Fix Released Bug description: What I expected to happen: By choosing the guest session option (either from the login screen or the user menu when logged in to a normal account) a guest session should be launched. What happened instead: By choosing either method, the screen goes blank for a moment before I am returned to the login screen. Looking at the logs, it looks like the guest "/home" is created in /tmp, but for whatever reason it can't be used. At first I thought it was due to the apparmor profile for the guest session, since it throws up a lot of denied entries, but even after putting that profile in complain mode, the issue persists. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: lightdm 1.0.1-0ubuntu6 ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4 Uname: Linux 3.0.0-12-generic i686 ApportVersion: 1.23-0ubuntu2 Architecture: i386 Date: Fri Oct 7 23:55:29 2011 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901) ProcEnviron: LANGUAGE=en_GB:en PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/870373/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp