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

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On 12/14/2010 11:22 PM, Rafael J. Wysocki wrote:
> 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?

It's very hard to reproduce (it happens once a week or two), so I can't
say yet. As it happened yesterday again, going to test it from now on.

thanks,
-- 
js
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