Re: PME# for add-on cards

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On Mon, Aug 24, 2009 at 01:12:39AM +0200, Rafael J. Wysocki wrote:

> After some debugging it turned out that PCI0 is the PCI host bridge
> (no-bus:pci0000:00), so apparently echoing PCI0 to /proc/acpi/wakeup causes
> a wake-up GPE to be set up for the host bridge which triggers wake-up once
> eth0 signals PME#.

Mm. That sounds entirely plausible. If it were a built-in card then the 
DSDT would provide that GPE, but as an add-in...

> First, I wonder if that's the case in general (anybody knows?).  Second, if
> that is the case, would it be a good idea to set up the host bridge wake-up GPE
> by default?

I'd expect this to be the case in general, yes. Systems that work 
without this probably have the BIOS enable it themselves on suspend. I 
suspect we'll have to set it to make sure.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
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