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
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to unity-greeter in Ubuntu.
https://bugs.launchpad.net/bugs/1538615
Title:
Cat causes login screen to hang
Status in unity-greeter package in Ubuntu:
Fix Released
Status in unity-greeter source package in Trusty:
Triaged
Bug description:
Steps to reproduce:
1. Leave laptop unattended in a cold room with a warm cat.
2. Cat will sit on laptop keyboard.
3. Wait 1 hour.
4. Lightdm will become unresponsive.
Symptoms:
Due to excessive password input by cat, lightdm acts oddly. I try to
hit enter to try the invalid password and then type in the correct
password, but enter has no affect. The cursor is not blinking, and
hitting backspace has no effect. Using Ctrl+a or using shift+Ctrl+left
arrow doesn't select the whole password to delete it. Hitting capslock
causes the warning symbol to appear or disappear. The mouse moves, but
clicking on the settings icon, date, sound icon, or language icon has
no effect. One person suggested seeing if the cat had triggered scroll
lock, but toggling between ctrl+q and ctrl+s had no effect. Logging in
on a virtual terminal still works.
Alternative steps to reproduce if cat is unavailable or uncooperative about
being placed on keyboard (see attached pictures):
0. Glare at cat.
1. Restart lightdm.
2. Log in as a normal user.
3. Lock screen with ctrl+alt+l (I'm running Ubuntu 15.10).
4. Weigh self. Weigh self + cat. Find books approximately equal to 10 lbs,
and various household items to simulate cat paws (I used two large nail
clippers, a fat key, and a bottle opener).
5. Put items on keyboard, avoiding function keys, backspace, and enter. Place
books on top of household items.
6. Wait 1 hour.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1538615/+subscriptions
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