Comment 19 for bug 1538615

I also experience the same problem, cat sleeping on keyboard instead of nearby cushion, causing the login screen to lock up or hang on two Ubuntu 18.04 machines. With the desktop machine, unplugging and reattaching the USB keyboard helped, but this is not an option on my laptop which is also affected by the same cat or bug. Btw, hissing sounds do not help either.

$ apt policy unity-greeter
unity-greeter:
  Installed: 18.04.0+18.04.20180314.1-0ubuntu2
  Candidate: 18.04.0+18.04.20180314.1-0ubuntu2
  Version table:
 *** 18.04.0+18.04.20180314.1-0ubuntu2 500
        500 http://at.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status