The greeters were moved to /usr/sbin but the PATH only contains /usr/lib/lightdm/lightdm:/usr/local/bin:/usr/bin:/bin. They used to be in libexecdir which is manually added to the path in session.c:session_start.
The greeter log at ~/.cache/lightdm/log/:1-greeter.log contains: exec: 33: lightdm-gtk-greeter: not found which is from /usr/lib/lightdm/lightdm-greeter-session. As a workaround until this is fixed, adding /usr/sbin to PATH before the exec on line 33 in that file will allow the greeter to start. This isn't an issue when lightdm runs normally because /usr/sbin is part of the environment received from pam, but some of the setup is skipped in the --test-mode session, and in the log above the pam environment is empty. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/860003 Title: running LightDM in test mode doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/860003/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
