Re: ACPI power off regression in 2.6.23-rc8 (NOT in rc7)

From: Linus Torvalds
Date: Tue Sep 25 2007 - 11:41:00 EST

On Tue, 25 Sep 2007 08:51:09 +0200 Damien Wyart <damien.wyart@xxxxxxx> wrote:
> Hello,
> After testing rc8, I noticed that I couldn't power off the computer
> directly, it only got halted and I had to press the power button
> manually. Just before displaying "System halted", the following message
> is displayed:
> ACPI : PCI interrupt for device 0000:02:08.0 disabled
> I had to first revert 5a50fe709d527f31169263e36601dd83446d5744 then
> f216cc3748a3a22c2b99390fddcdafa0583791a2 (handling of Sx states) to
> recover previous behaviour.

Hmm. Those things *do* seem to be suspicious.

For example, those commits seem to move code that used to be inside
CONFIG_PM (which pretty much *everybody* has) to be inside
CONFIG_ACPI_SLEEP (which is a totally different thing, and depends on
whether the user asked for suspend support or not!

Damien - does it work if you ask for SUSPEND or HIBERNATION support?

Len - why are you guys moving stuff into CONFIG_PM_SLEEP? I know you seem
to think that absolutely *everybody* should always support suspend and
hibernation, but the fact is, not everybody does. And it's a totally
separate thing for normal ACPI CPU runstate support that people have used
to manage a *running* CPU (and shutting it down).

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