I think the problem is: 1. You log into a standard install 2. You log out 3. You install GNOME and uninstall Unity 4. You attempt to log in
The configured session for your user is "ubuntu" but this session is no longer available. Unity Greeter doesn't show a session switcher since only one valid session is installed (GNOME). The solution is for unity-greeter to detect that your configured session is not available and show a session switcher / or just log you into the default. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-greeter in Ubuntu. https://bugs.launchpad.net/bugs/1303725 Title: Unable to log in if user has invalid session configured and no session switcher shown Status in “unity-greeter” package in Ubuntu: Triaged Bug description: I was having some unrelated problems with unity, so I temporarily removed it which caused me to stumble across this problem. I have gnome also installed on my system, and was planning to use it in the meanwhile. After I removed unity and reboot my computer, I noticed the session selector disappeared. From the ubuntu wiki I found this information: The session switcher will only show up if you have more than one VALID session; a valid session is one that points to a valid executable. This would be fine, except for lightdm assumed that the one session available was 'ubuntu.' I could not change the session because the selector was missing. Every attempt to log in would begin to appear as if it worked, but then I would just be stuck looking at the background image and nothing else. I looked though the logs and found these lines in x-0-greeter.log [+0.03s] DEBUG: Connected version=1.8.5 default-session=ubuntu show-manual-login=false hide-users=false has-guest-account=true show-remote-login=true ... [+0.09s] DEBUG: Ignoring session /usr/share/xsessions/ubuntu.desktop [+0.09s] DEBUG: Loaded session /usr/share/xsessions/gnome.desktop (GNOME, This session logs you into GNOME) ... [+1.79s] DEBUG: Authentication complete for user jonathan with return code 0 [+1.79s] DEBUG: Starting session ubuntu So I changed the default session from 'ubuntu' to 'gnome', by running the following command: sudo /usr/lib/lightdm/lightdm-set-defaults --session gnome (I also verified in /etc/lightdm/lightdm.conf that it worked) This time around the log showed that default-session=gnome, but still attempted to load 'ubuntu' regardless. The only way I was ever able to get into gnome was by making a copy of gnome.desktop in /usr/share/xsessions, renaming the copy to ubuntu.desktop, forcing the session switcher to reappear. It worked, but it's a little bit hackish. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1303725/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
