This happend after adding proposed updates to Ubuntu 14.10 on my Ugoos UT3 RK3288 device.
-- 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/1424460 Title: package lightdm 1.12.2-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 Status in lightdm package in Ubuntu: Confirmed Bug description: trying to install updates on ubuntu 14.10, reports package installation failed ProblemType: Package DistroRelease: Ubuntu 14.10 Package: lightdm 1.12.2-0ubuntu1 ProcVersionSignature: Ubuntu 3.16.0-31.41-generic 3.16.7-ckt5 Uname: Linux 3.16.0-31-generic x86_64 ApportVersion: 2.14.7-0ubuntu8.2 Architecture: amd64 Date: Sat Feb 21 21:10:43 2015 DuplicateSignature: package:lightdm:1.12.2-0ubuntu1:subprocess installed post-installation script returned error exit status 1 ErrorMessage: subprocess installed post-installation script returned error exit status 1 InstallationDate: Installed on 2014-11-12 (102 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) SourcePackage: lightdm Title: package lightdm 1.12.2-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1424460/+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