Re: [linux-pm] Re: ehci_hcd causes box to resume immediately after suspend to RAM

On Tuesday, 12 June 2007 13:59, Rafael J. Wysocki wrote:
> On Tuesday, 12 June 2007 03:50, Zhang Rui wrote:
> > > > > 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
> > > 
> > > I tried that but it didn't help.  Namely, the box resumed right after
> > > suspending as it had done before.
> > > 
> > > The only way to prevent it from resuming immediately after the suspend is to
> > > 'rmmod ehci_hcd' before the suspend.
> > > 
> > > Interestingly enough, I have no such problems with EHCI on the other test box
> > > that is able to suspend to RAM and resume.
> > > 
> > What's the kernel version you are using?
> > Is it the same problem shown here?
> > http://lkml.org/lkml/2007/5/18/55
> > 2.6.22-rc1-mm1 may have this problem.
> 
> Yes, I remeber this thread.

s/remeber/remember/

> The kernel is 2.6.22-rc4 with the patches from
> http://www.sisk.pl/kernel/hibernation_and_suspend/2.6.22-rc4/patches/
> applied.
> 
> Greetings,
> Rafael
 

-- 
"Premature optimization is the root of all evil." - Donald Knuth

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