Re: ehci_hcd related S3 lockup on ASUS laptops, again

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On Wednesday, April 18, 2012, Alan Stern wrote:
> On Wed, 18 Apr 2012, Rafael J. Wysocki wrote:
> 
> > > Yes, there are ways to work around this.  At the moment I'm not sure 
> > > what would be best; we can ask Rafael.  One big remaining puzzle: Why 
> > > are the EHCI controllers the only devices that cause a crash when left 
> > > in D3 during suspend?  We may never know...
> > 
> > Are they put into D3 by ACPI or using the native PCI PM?
> 
> PCI PM, definitely.  Maybe ACPI gets into the act as well, but I doubt 
> it.  How would we tell?

If ACPI is involved, the dev_printk() in acpi_pci_set_power_state() should
trigger.

Thanks,
Rafael
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