> I first asked acpid maintainer, but he tend to think that it could be a problem
> with the kernel itself (see bug #648522).
He was right --- this functionality is the kernel's responsibility.
Merging for easy reference.
[...]
> a "shutdown -h now" command, the system halts but does never power off.
[...]
> I observed similar problem with an ubuntu live CD (11.10), but not with an
> older one (10.04).
Sounds like this is a regression. Can you try the kernel from squeeze
or squeeze-proposed-updates, to confirm?
Please test without the nvidia and virtualbox drivers, so we can rule
those out as a cause (or track it down from that direction if one of
those turns out to be the cause).
Output of "dmesg" and of "acpidump" from immediately after booting
a working and a non-working kernel would be helpful, too.
Thanks and hope that helps,
Jonathan
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Bug#648754: suspend works, shutdown does not power off
