Re: Resume hangs [was: mmotm 2010-12-02-16-34 uploaded]

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On Fri, 4 Feb 2011, Jiri Slaby wrote:

> >> It seems to suffice... No hangs still. Should I enable pm_async back
> >> again to confirm the issue is still present?
> > 
> > Yes, please, it would be good to know for sure.
> 
> Ok, confirmed right now :).
> 
> I disabled pm_async for USB again. What do you suggest next?

What happens if you leave pm_async enabled but unplug all the USB 
devices before suspending?  If there are any USB devices you can't 
unplug, you can get an equivalent result by unconfiguring the root 
hubs:

	for a in /sys/bus/usb/devices/usb* ; do
		echo 0 >$a/bConfigurationValue
	done

Alan Stern

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