Comment 18 for bug 1538615

Ok. This bug should be reopened. My lock screen was frozen few times in last months by a cleaning lady who put my headphones on keyboard when cleaning my desk, and left them until next morning. Lock screen is frozen and keyboard or mouse actions do nothing. I wrote about it on https://askubuntu.com/questions/1121906/how-to-prevent-cleaner-from-hanging-my-lock-screen-in-ubuntu-16-04

I have version with this "fix" but it does not work.

$ apt policy unity-greeter
unity-greeter:
  Installed: 16.04.2-0ubuntu1
  Candidate: 16.04.2-0ubuntu1
  Version table:
 *** 16.04.2-0ubuntu1 500
        500 http://pl.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status