On 02/04/2011 08:33 PM, Alan Stern wrote:
> 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
This doesn't seem to help. The hang happened 3 times during the 2 weeks.
I have /etc/pm/sleep.d/99usb-debug with:
#!/bin/bash
send() {
for a in /sys/bus/usb/devices/usb* ; do
echo $1 >$a/bConfigurationValue
done
}
case "$1" in
hibernate|suspend)
send 0
;;
thaw|resume)
send 1
;;
*)
;;
esac
exit 0
And it indeed properly enable/disable usb before/after suspend.
regards,
--
js
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