The relevant parts of lightdm.log show: [+16.34s] DEBUG: Session pid=5887: Running command /usr/sbin/lightdm-session gnome-session --session=ubuntu [+16.34s] DEBUG: Creating shared data directory /var/lib/lightdm-data/richard [+16.34s] DEBUG: Session pid=5887: Logging to .xsession-errors [+16.37s] DEBUG: Activating VT 7 [+16.37s] DEBUG: Activating login1 session c28 [+16.98s] DEBUG: Session pid=5887: Exited with return value 0
Which is showing that the session has immediately ended as soon as you logged in. You might be able to better debug this by checking ~/richard /.xsession-errors after this occurs. ** Package changed: lightdm (Ubuntu) => unity (Ubuntu) -- 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/1629701 Title: log-in screen loops indefinitely Status in unity package in Ubuntu: New Bug description: New installation of Ubunto 14.04 delivered on a Dell Precision Tower 5810. After first major upgrade including updates to kernel and NVIDIA graphics drivers, this issue appeared. \\loin screen appears - then when password is entered and either mouse-click or CR, the screen goes black and after a short time (1-2s) the log on screen re-appears. None of the suggested repair routes have worked. (Routes include trying gdm, updating lightdm and gdm.) NVIDIA graphics card is Quadro K1200. Description 14.04.5 LTS, release 14.04 Package is xorg. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.10.6-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-38.57~14.04.1-generic 4.4.19 Uname: Linux 4.4.0-38-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.21 Architecture: amd64 Date: Sun Oct 2 20:25:25 2016 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-trusty-amd64-osp1-20150720-0 InstallationDate: Installed on 2016-09-25 (6 days ago) InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20150720-04:06 LightdmConfig: [SeatDefaults] autologin-guest=false autologin-user-timeout=0 autologin-session=lightdm-autologin SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1629701/+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
