I've installed ubuntu 14.04 on my old notebook (Acer Travelmate 2420).
Everything is fine except the shutdown.
It's hanging in the last screen ("ubuntu" with the points beneath - they change their colour properly. As long as I don't press the "on/off" button of the notebook).
I've changed this line:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force"
it doesn't work.
Can anybody help?
I'm a ubuntu beginner, so I maybe don't understand too specific things.