I just ran into this issue yesterday with a fresh install of Xubuntu 14.04.4 on a machine with nVidia 650m video. I can blindly type in password and then get to lightdm session when in nVidia mode. Switching to Intel mode the login works as it should. I'm able to run this way for now, but it's a show stopper issue for the average user.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1419507 Title: gpu-manager writes wrong driver in xorg.conf fro nvidia-prime To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1419507/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs