There is no useful information in this report. Odd though that is says it crashed but there is no coredump/stacktrace. Did gdm crash at some point, requiring a forced restart?
** Changed in: gdm (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gdm in Ubuntu. https://bugs.launchpad.net/bugs/1421991 Title: Apport showed a gdm error while booting Vivid Status in gdm package in Ubuntu: Invalid Bug description: No idea what's up - apport just asked me if I wanted to file this bug report and I said yes so we can see what may be going on. ProblemType: Crash DistroRelease: Ubuntu 15.04 Package: gdm 3.14.1-0ubuntu1 ProcVersionSignature: Ubuntu 3.18.0-13.14-generic 3.18.5 Uname: Linux 3.18.0-13-generic i686 ApportVersion: 2.16.1-0ubuntu2 Architecture: i386 Date: Sat Feb 14 10:09:41 2015 ExecutablePath: /usr/sbin/gdm InstallationDate: Installed on 2015-02-13 (0 days ago) InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha i386 (20150120.1) ProcCmdline: gdm ProcEnviron: TERM=linux PATH=(custom, no user) LANG=en_US.UTF-8 SourcePackage: gdm UpgradeStatus: No upgrade log present (probably fresh install) mtime.conffile..etc.gdm.custom.conf: 2015-02-13T17:15:05.583636 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1421991/+subscriptions -- 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