Hello, here's what I did on my Xubuntu installation that seems to work: In this file: /etc/xdg/xdg-xubuntu/lightdm/
In line 27, in a default installation, it reads: show-indicators=power;~session;~language;~a11y;~power; Remove the first "power" entry, leaving only the built-in indicators: show-indicators=~session;~language;~a11y;~power; Save the file, and any subsequent lock screens and the processes they spawn should now exit properly upon screen unlock. I can't say for sure why it solves the issue on my Xubuntu, but I suspect that trying to include two power indicators might cause one or the other to prevent lightdm's indicator services instance from properly terminating. Can you see if this solves the issue on your computers? -- 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/1322275 Title: lightdm sessions started by dm-tool lock (or a session locker) never get closed Status in Light Display Manager: New Status in lightdm package in Ubuntu: Confirmed Status in upstart package in Ubuntu: Confirmed Bug description: dm-tool lock starts a new lightdm greeter (for unlocking) and a new logind session. After unlocking the greeter disappears, but the logind session never closes. loginctl session status c24 reports something like: c24 - lightdm (103) Since: Thu 2014-05-22 18:38:27 CEST; 30min ago Leader: 7872 Seat: seat0; vc8 Display: :1 Service: lightdm-greeter; type x11; class greeter State: closing CGroup: systemd:/user/103.user/c24.session └─7907 init --user --startup-event indicator-services-start This results in an accumulation of stale lightdm sessions after using e.g. a session locker for a while. I get this issue on a freshly installed and fully updated Xubuntu 14.04. To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1322275/+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