I have a ruvo with a fresh installation of 12.04. When I try and shutdown the computer reboots. Until I upgraded (by doing a fresh install) I ran it with Ubuntu 10.04 and I didn't have this issue.
I have tried
sudo shutdown -h now sudo shutdown -P now sudo init 0 sudo poweroff
All of these cause a reboot.
I have added
acpi=norq to my grub file as suggested by someone in the first post below.
This is being used as a mythtv frontend and I would like the power button to shut it down. I have modified the button to perform a
shutdown -h now, but this too causes a reboot.
I have studied the posts below and tried some of these ideas, but with no luck so far.