Re: [git pull request] ACPI patches for 2.6.34-rc6

Matthew Garrett
2010-05-11T18:23:04Z

On Tue, May 11, 2010 at 11:17:34AM -0700, Linus Torvalds wrote:
>
>
> On Tue, 11 May 2010, Matthew Garrett wrote:
> >
> > I see Windows write the SCI_EN bit without reading it first and without
> > calling the ACPI enable SMM function.
>
> Hmm. So presumably Windows doesn't even do them bit-by-bit, but simply
> does a "restore PM1 Control register value" on resume.

Yup.

> And I guess it probably does the same for the PM1_ENABLE register and the
> PM2 control registers too?

Haven't checked those, but could do so easily enough.

(I say easily enough. Turns out that getting Windows to do S3 under qemu
is a fair amount of work)
--
Matthew Garrett | mjg59@srcf.ucam.org