You have been subscribed to a public bug: Mythbuntu uses Xfce + Lightdm for precise. On Lucid it also used Xfce, but it used gdm for the login manager (lightdm wasn't yet available).
Presumably unity was pulled in because of gdm still being installed after the upgrade. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: update-manager 1:0.156.5 ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6 Uname: Linux 3.2.0-16-generic i686 NonfreeKernelModules: nvidia ApportVersion: 1.91-0ubuntu1 Architecture: i386 Date: Mon Feb 20 01:01:28 2012 GsettingsChanges: com.ubuntu.update-manager first-run false com.ubuntu.update-manager launch-time 1254290448 PackageArchitecture: all ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: update-manager UpgradeStatus: Upgraded to precise on 2012-02-17 (2 days ago) ** Affects: gnome-session (Ubuntu) Importance: High Status: Confirmed ** Tags: apport-bug dist-upgrade i386 lucid2precise precise rls-mgr-p-tracking -- Mythbuntu upgrade from Lucid to Precise pulls in all of unity https://bugs.launchpad.net/bugs/936761 You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-session in Ubuntu. -- 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