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.

• Why do I get a reboot instead of a shutdown?
• Ubuntu 12.04 not shutting down properly
• Stuck on reboot and shutdown
• Shutdown does not power off computer