I recently installed Loki (64bit) in another of my laptops (I have Freya in the first one). Loki (as it is in Freya) boots very fast. My problem is in the shut down process. It takes awful long (compared to Freya). Will appreciate any help to troubleshoot this problem. Thanks.
The problem is caused by the Thermal Daemon Service not shutting down properly. The default timeout is 90s.
This can be resolved by changing the timeout length.
Run this command
sudo scratch-text-editor /etc/systemd/system.conf
Delete the # in front of the the two lines below and change the 90s to something lower. I've set mine to 6s and my system shuts down very quickly.
I have the same problem too! What I've seen is that if you turn on the computer and only a few minutes then you turn down the computer it won't last so much this also happens when you open few programs, but when working a lot on the OS it will take a long time for shooting. Hope this can be helpful and that it ain't something you already know