[Bug 595822] Re: Hibernate does not power off the machine

[Colin King]

The ACPI _WAK method looks like a possible problem here for suspend
wakeup. It should return a package containing two Integers containing
status and the power supply S-state, quoting the ACPI Spec, section
7.3.7 \_WAK (System Wake).

Also, if reboot or shutdown does not work, please disable ACPI using the
following kernel option:

acpi=off

If this allows you to shutdown, then we know it's an ACPI issue,
basically the machine cannot transition to state S5. This could be
because the _PTS (Prepare to Sleep) Method is broken. If this is so, it
could explain why suspend and hibernate is broken too.

-- 
Hibernate does not power off the machine
https://bugs.launchpad.net/bugs/595822
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