Have verified the issue exists on a Noble install. plasma-workspace packages were updated to the version in proposed. The plasma session then starts correctly on login and plasma session appears on some testing to run as expected.
** Description changed: - When switching the displaymanager from sddm to lightdm, login fails due - to misconfigured lightdm configuration file. + [ Impact ] - $ cat /usr/share/lightdm/lightdm.conf.d/40-kde-plasma-kf5.conf + * Switch to lightdm and plasma will not load. + + [ Test Plan ] + + * With Plasma installed and working, via the terminal install lightdm. + * Select lightdm as the default DM when prompted. + * Reboot to lightdm and try to log in. + * Without fix lightdm will display "failed to start session" and remian at the login screen + * With the fix login works and plasma session loads as expected. + + [ Where problems could occur ] + + * Plasma workspace which supplies plasmashell has been rebuilt, so + testers should do some due diligence to make sure that plasma starts and + runs as expected. + + + When switching the displaymanager from sddm to lightdm, login fails due to misconfigured lightdm configuration file. + + $ cat /usr/share/lightdm/lightdm.conf.d/40-kde-plasma-kf5.conf [SeatDefaults] user-session=kde-plasma-kf5 $ls /usr/share/xsessions/* /usr/share/xsessions/plasma.desktop ##### Changing /usr/share/lightdm/lightdm.conf.d/40-kde-plasma-kf5.conf to - $ cat /usr/share/lightdm/lightdm.conf.d/40-kde-plasma-kf5.conf + $ cat /usr/share/lightdm/lightdm.conf.d/40-kde-plasma-kf5.conf [SeatDefaults] user-session=plasma or renaming /usr/share/xsessions/plasma.desktop to /usr/share/xsessions/kde-plasma-kf5.desktop solves the issue. ##### $ lsb_release -rd Description: Ubuntu 16.04.1 LTS Release: 16.04 - $ apt-cache policy plasma-workspace plasma-workspace: - Installed: 4:5.5.5.2-0ubuntu1 - Candidate: 4:5.5.5.2-0ubuntu1 - Version table: - *** 4:5.5.5.2-0ubuntu1 500 - 500 http://de.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages - 100 /var/lib/dpkg/status + Installed: 4:5.5.5.2-0ubuntu1 + Candidate: 4:5.5.5.2-0ubuntu1 + Version table: + *** 4:5.5.5.2-0ubuntu1 500 + 500 http://de.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages + 100 /var/lib/dpkg/status ##### ** Tags removed: verification-needed verification-needed-noble ** Tags added: verification-done-noble verification-none -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to plasma-workspace in Ubuntu. https://bugs.launchpad.net/bugs/1629543 Title: [SRU] KDE does not start when using lightdm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-workspace/+bug/1629543/+subscriptions -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
