On Sat, 9 Jun 2007, Rafael J. Wysocki wrote:
> > You can try using the patch below to see what happens when you manually
> > suspend the controller. It enables PCI devices to respond to the
> > legacy power/state attribute. You should look at what "lspci -vv" says
> > about the controller's power management signals, both before and after
> > suspending the PCI device entry.
>
> It works as expected, AFAICS. That is, after I echo '2' to the 'state' file,
> it shows that the controller is in D3.
At that point, does "lspci -vv" show that the controller is trying to
signal a wakeup event? That is, is the PME# signal asserted?
(Not that knowing this will help very much -- I'm not sure what we
could do with that information, and in any case there are other ways
besides PME# for on-board devices to report wakeup requests. I ask
mainly out of curiousity.)
> I've tried to suspend with the controller in that state, but it's resumed
> immediately, as before.
>
> > Maybe also see what ACPI reports.
>
> How can I see that?
I wish I knew. Maybe you can try asking on the ACPI mailing list.
The simplest workaround should be to disable remote wakeup for that
controller:
echo disable >/sys/bus/pci/devices/.../power/wakeup
Alan Stern
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