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

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On Tuesday, December 14, 2010, Jiri Slaby wrote:
> On 12/13/2010 10:10 PM, Rafael J. Wysocki wrote:
> > On Monday, December 13, 2010, Jiri Slaby wrote:
> >> On 12/05/2010 02:08 PM, Rafael J. Wysocki wrote:
> >>> On Sunday, December 05, 2010, Jiri Slaby wrote:
> >>>> On 12/03/2010 01:34 AM, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
> >>>>> The mm-of-the-moment snapshot 2010-12-02-16-34 has been uploaded to
> >>>>
> >>>> Hi, this kernel regresses with respect to resume. It doesn't wake up,
> >>>> the screen is black with blinking cursor at position [1, 1].
> >>>> 2010-11-23-16-12 seemed to be OK. In this one it is 100% reproducible so
> >>>> far.
> >>>>
> >>>> I'm using pm-suspend, any ideas what to test before I start to find the
> >>>> reason on my own?
> >>>
> >>> Please try the pm_test tests for core, processors and devices, eg.:
> >>
> >> Hmm, I haven't seen the issues since then. So it had to be some kind of
> >> coincidence -- I see the issue occasionally for some time already. Now
> >> it triggered twice in a row after I updated the kernel.
> > 
> > Hmm.  What hardware is that?
> 
> What exactly do you want to know about it? It's some specific intel
> desktop machine, 3 years old, 2 intel cores, 6G of mem, 2 sata disks in
> raid, dvb-t usb receiver (af9015), usb keyboard and mouse.

I'm seeing pretty much the same symptoms on quite different hardware, except
for one thing: USB keyboard and mouse.

Have you checked if writing 0 to /sys/power/pm_async helps?

Rafael
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