It appears that lightdm 1.2.3 still has the problem. The issue cropped up in an install of 64-bit Mythbuntu 12.04, after it had been running fine for about 15 months. The nvidia 6150 chip was failing and locking up the system randomly, so it was replaced with an nvidia 8600GTS PCI-E card. After the first successful boot with the 8600GTS card, the user could not log in to the PC, until the /home/username/.Xauthority file ownership was changed from root to the users username.
The /var/log/lightdm file shows that lightdm 1.2.3 is running. [+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log [+0.00s] DEBUG: Starting Light Display Manager 1.2.3, UID=0 PID=1351 [+0.00s] DEBUG: Loaded configuration from /etc/lightdm/lightdm.conf [+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager The following files are in the apt archives on the machine, dated July 19, 2003: /var/cache/apt/archives/liblightdm-gobject-1-0_1.2.3-0ubuntu2.3_amd64.deb /var/cache/apt/archives/lightdm_1.2.3-0ubuntu2.3_amd64.deb -- 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/871667 Title: .Xauthority sometimes owned by root, which blocks login Status in Light Display Manager: New Status in “lightdm” package in Ubuntu: Fix Released Status in “lightdm” source package in Oneiric: Fix Released Bug description: Each time I upgrade to a newer ubuntu on a particular machine, something breaks. Last time I was unable to log in via GDM and I have to reinstall the machine. This time, I upgraded to oneiric today, and, of course, lightdm cannot start unity nor unity-2d: after entering a correct password it just restarts itself. This is a report using apport-cli - a duplicate of https://bugs.launchpad.net/ubuntu/+bug/871664 ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: lightdm 1.0.1-0ubuntu6 ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4 Uname: Linux 3.0.0-12-generic x86_64 ApportVersion: 1.23-0ubuntu3 Architecture: amd64 Date: Mon Oct 10 11:58:51 2011 EcryptfsInUse: Yes InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) ProcEnviron: SHELL=/bin/bash PATH=(custom, user) LANG=en_US.UTF-8 LANGUAGE=en_US.utf8 SourcePackage: lightdm UpgradeStatus: Upgraded to oneiric on 2011-10-10 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/871667/+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

