Computer hangs on reboot or shutdown, typically for >10 mins, Ubuntu 16.04 and previous versions

[Lilli Christoph]

I am aware of the thread here:

https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1464917

People there are asking that if you have the same/similar bug to report it separately, so that's what I'm doing.

What I've noticed is that my shutdown process hangs as some point, usually with the screen being black or with a single cursor. After >10 mins, the computer will finally shut off. I've had this issue I think since 15.04, definitely in 15.10, and now still in 16.04.

I've tried the fix

$ sudo systemctl reboot

which worked one time, but not another time.

I've also tried

$ sudo swapoff -a sudo systemctl reboot

and that appeared to work, but I haven't tested it enough times to say it always works. For what it's worth, turning off the swap probably took longer than my typical black screen shutdown so it's really not a stopgap fix either way.

I know this isn't enough information to be sure I'm having the swap/systemd failure, so let me know what else you need. Thanks.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.