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    SubjectRe: [git pull request] ACPI patches for 2.6.34-rc6
    On Fri, May 07, 2010 at 10:36:00PM +0100, Matthew Garrett wrote:
    > On Fri, May 07, 2010 at 02:21:08PM -0700, Linus Torvalds wrote:
    > > Well, is there any reason to have 'set_sci_en_on_resume' at all then?
    > I'd hope not, but it depends on what Windows does on resume. If it
    > doesn't do the SMM call and just does the register write instead, then
    > it may be that some machines are on that list because the SMM call
    > breaks them rather than because they need the register to be set by
    > hand. I'm planning on instrumenting it to check, but haven't had time to
    > do so yet.

    I've now checked the behaviour of Windows. It turns out that it never
    makes the ACPI enable SMM call on resume. This is consistent with which shows a bug
    being introduced by us making the enable call in the first place.
    Merging my patch and removing the blacklist would re-break these
    machines. Instead, we should just unconditionally set SCI_EN since this
    is the tested configuration. I'll send a followup patch.

    Matthew Garrett |

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