I hadn't tried that one yet. But I tried it now. I installed lightdm-gtk-greeter 201503290547~ubuntu15.04.1 from https://code.launchpad.net/~kalgasnik/+archive/ubuntu/lightdm-gtk-greeter-post-2.0.0 and removed the active-monitor option.
This fix solved the problem for me. After the reboot the login screen comes up right away. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1410406 Title: black screen after booting, 100% cpu usage To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1410406/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
