This problem still exists within Precise. I ran sudo apt-get purge lightdm and got the following output in the Terminal: Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: lightdm* ubuntu-desktop* 0 upgraded, 0 newly installed, 2 to remove and 5 not upgraded. After this operation, 505 kB disk space will be freed. Do you want to continue [Y/n]? y (Reading database ... 232740 files and directories currently installed.) Removing ubuntu-desktop ... Removing lightdm ... Purging configuration files for lightdm ... Removing user `lightdm' ... Warning: group `lightdm' has no more members. userdel: user lightdm is currently logged in /usr/sbin/deluser: `/usr/sbin/userdel lightdm' returned error code 8. Exiting. dpkg: error processing lightdm (--purge): subprocess installed post-removal script returned error exit status 1 Processing triggers for man-db ... Processing triggers for ureadahead ... ureadahead will be reprofiled on next reboot Errors were encountered while processing: lightdm E: Sub-process /usr/bin/dpkg returned an error code (1)
-- 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/992376 Title: package lightdm (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 1 Status in “lightdm” package in Ubuntu: Invalid Bug description: lightdm failed to install or uninstall properly. While it was installed I could not login to my system. stopping the service and then removing the package and installing gdm fixed the issue. Not as pretty but at least I can login. Description: Ubuntu 12.04 LTS Release: 12.04 ProblemType: Package DistroRelease: Ubuntu 12.04 Package: lightdm (not installed) ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.0.1-0ubuntu7 AptOrdering: lightdm-gtk-greeter: Purge ubuntu-desktop: Purge lightdm: Purge Architecture: amd64 Date: Mon Apr 30 21:15:34 2012 ErrorMessage: subprocess installed post-removal script returned error exit status 1 InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1) SourcePackage: lightdm Title: package lightdm (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 1 UpgradeStatus: Upgraded to precise on 2012-04-27 (3 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/992376/+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

