Cat causes login screen to hang

The Ubuntu 15.10 lightdm package version is 1.16.6-0ubuntu1

If you find the bug, please put a "Suggested-by: Miss Elisa Sharp" in the patch body. One could claim the cat was unintentionally finding bugs, but I'm pretty sure she's a furry security researcher in disguise. She has managed to send email from an unlocked laptop before.

Optionally, it would be great to have a "GTO Cat!" lightdm feature to beep in an extremely annoying way when excessive password input is detected.

s/beep/hiss/

Possible workaround? Train cat to also lay on Enter/Return key.

Tried to reproduce using a PDF of "Analysis and Design of Analog Integrated Circuits, 5th Edition" loaded on a micro-SD card. Did not work. Added the entire Project Gutenberg archives on micro-SD card, still did not work. Please advise.

Sounds like the input field should limit the number of characters to something reasonable.

I switched someone to Ubuntu 15.10 and she left something above the keyboard. This is the first time that her computer crashes with Ubuntu and I think it's because of this issue. A big string of asterisks is shown in the password field and they cannot be erased or selected.

BTW, I was laughing when I first read this bug a few days ago. Karma exists :-)

Please ask Miss Elisa Sharp to confirm if this fixes the issue and then we can SRU back to Trusty.

Just an aside, both this bug and the one I duped to it mention Ctrl-Alt-L in the reproduction steps, which would be the unity lock screen, not lightdm, right? Or do they both use the same unity-greeter theme and, thus, will both benefit from the 200 char limit?

This bug was fixed in the package unity-greeter - 16.04.2-0ubuntu1

---------------
unity-greeter (16.04.2-0ubuntu1) xenial; urgency=medium

  * New upstream release:
    - Limit prompt fields to 200 characters (LP: #1538615)

 -- Robert Ancell <email address hidden> Thu, 24 Mar 2016 14:03:38 +1300

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

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

Hey!
I had the same issue a couple times. Password field has been unclickable. I've been forced to hard reset my laptop. Take a look to my beauty cat )

$ apt policy unity-greeter
unity-greeter:
  Installed: (none)
  Candidate: 18.04.0+20.04.20200312-0ubuntu2
  Version table:
     18.04.0+20.04.20200312-0ubuntu2 500
        500 http://pt.archive.ubuntu.com/ubuntu focal/universe amd64 Packages

Unable to reproduce.
Ubuntu 23.10, Wayland, Gnome 45.2