11-03-2018, 09:35 AM
I don't think it has anything to do with malfunctioning. Ubuntu 18.04 has a standard startup and shutdown down of 90 seconds. That is way too long for a simple desktop. You can easily change that by follwing this instruction:
https://bugs.launchpad.net/ubuntu/+sourc...ug/1787853
https://bugs.launchpad.net/ubuntu/+sourc...ug/1787853