I re-tested this last night and can confirm it is now resolved in LightDM 1.12.1. Thank you!
** Changed in: lightdm (Ubuntu) Status: Incomplete => Fix Released -- 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/1369952 Title: LightDM crashed when selecting "Try Ubuntu" on Ubuntu MATE Status in “lightdm” package in Ubuntu: Fix Released Bug description: I am the maintainer of Ubuntu MATE Remix, we are currently working towards being an official Ubuntu flavour. Since early September LightDM crashes when the option to "Try Ubuntu" is selected from the Welcome screen. LightDM was working fine upto the 28th August, if I track the timeline it appears to have started crashing since lightdm (1.11.8-0ubuntu1). It is also worth noting that I include the following configurating in the live session `/etc/lightdm/lightdm.conf.d/90-ubuntu-mate.conf` which has the following content. [SeatDefaults] autologin-user=ubuntu autologin-user-timeout=0 user-session=mate You can download the current pre-release .iso images of Ubuntu MATE that exhibit this issue from https://ubuntu-mate.org/1369952/ ProblemType: Crash DistroRelease: Ubuntu 14.10 Package: lightdm 1.11.9-0ubuntu1 ProcVersionSignature: Ubuntu 3.16.0-14.20-generic 3.16.2 Uname: Linux 3.16.0-14-generic x86_64 ApportVersion: 2.14.7-0ubuntu2 Architecture: amd64 CasperVersion: 1.344 Date: Tue Sep 16 09:11:18 2014 ExecutablePath: /usr/sbin/lightdm LiveMediaBuild: Ubuntu MATE 14.10 "Utopic Unicorn" - pre-beta2.25818 amd64 (20140915) ProcCmdline: lightdm ProcEnviron: TERM=linux PATH=(custom, no user) Signal: 6 SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1369952/+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