In my case, the bug appeared every time I used the login screen (now I'm using GDM as a workaround).
As said above, one way to stop the loop is moving up-down in the user list (if you have more than 1 user, if not simply moving to the guest session as the other user already said). I managed to stop it (sometimes) by moving to another tty console and going back to the login screen too. The first time I logged in it didn't happen. It started happening after fully updating my fresh install of the beta 2, changing my wallpaper and adding 2 more users. Given what other people experienced, maybe it could be one of the updates? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/946674 Title: unity-greeter crashed with SIGSEGV in background_loader_ready_cb() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/946674/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs