lkml.org 
[lkml]   [2011]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [linux-pm] Resume hangs [was: mmotm 2010-12-02-16-34 uploaded]
On Fri, 4 Feb 2011, Jiri Slaby wrote:

> 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?
>
> Then I cannot suspend at all (ENOINPUTDEVICE)... And this would be
> painful as the bug occurs once a week or so.

You can suspend using a remote network login. Agreed, this would be
painful.

> > 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
>
> Well, I can put this into suspend/resume scripts. What's the opposite
> operation? 1 > $a/bConfigurationValue?

Yes.

Alan Stern



\
 
 \ /
  Last update: 2011-02-04 21:09    [from the cache]
©2003-2011 Jasper Spaans