Ubuntu 18.04 stuck at shutdown
While none of the other answers here helped for me (encountering the same problem), I fixed it by switching from the X.org graphics driver to the propietary nvidia driver that is recommended under software&updates. Since then, reboot works flawlessly.
My setup: Asus G Series Laptop G501VW, with Nvidia 960M graphics card.
To do this:
- open Software&Updates (top left: Click on activities and type "software". Pick software&updates)
- go to "additional drivers"
- select a nvidia driver instead of the X.org driver
- reboot the system
Same problem here on my laptop. After some observation, I found out that it has something to do with power saving mode specially automatic suspend.
Go to Settings > Power then turn off all Automatic Suspend options. Also choose Blank screen to Never.
Till Ubuntu team will figure out why suspend mode is interfering with shutdown process, this solved my problem.
Hope this helps
Try a couple of sudo reboots from terminal to see if it clears things up: 1st to try, reboot without writing wtmp file:
sudo reboot -d
If that reboots successfully then try your natural close down. If it doesn't reboot, try forced reboot:
sudo reboot -f
If this was an upgrade from 16.04 to 18.04, it may be worth considering a clean install.