I too was affected by this bug. I run a fully updated 16.04 installation (currently 16.04.2) of Ubuntu. I used nouveau. When I pressed the power button on my work desktop to wake it from suspend, *sometimes* (here I differ from the original reporter) the login screen would appear and freeze. The system would not completely lock up. I could use ctrl + alt + f2 to switch to TTY2 and then restart the computer, like the original reporter.
If I tried restarting lightdm via sudo service lightdm restart, the computer would completely lock up and I had to perform a hard restart. I successfully worked around the issue by installing the proprietary nvidia driver (nvidia-340). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1605813 Title: lock screen freezes while trying to wake from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1605813/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
