I have attached both the strace and the gdb log. It looks like I am missing debug symbols for gdb to work properly. I hope one of these files helps finding the problem.
** Attachment added: "gdb log" https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1410406/+attachment/4298534/+files/gdb-lightdm-gtk-greeter.log -- 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
