I've installed Ubuntu 14.04 on my lab and Issue is that, after the shutdown my desktop, automatically restart machine after x hour or minute then automatic restart or poweroff anytime.

Sometime also machines are not shutdown properly, its stuck !

Action taken :

1) On /etc/default/grub :

sudo gedit /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force apm=power_off"

sudo gedit /etc/modules
apm power_off=1

2) System packages are up to date.

Any one help me that why shutdown related issues on ubuntu 14.04.

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