linux-kernel - Re: BISECTED: 2.6.29-rc2 regression: hibernation hang on eeepc-701

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Date:	Fri, 23 Jan 2009 09:45:48 +0000
From:	Alan Jenkins <alan-jenkins@...fmail.co.uk>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	kernel-testers@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org, Pavel Machek <pavel@...e.cz>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: BISECTED: 2.6.29-rc2 regression: hibernation hang on eeepc-701

Rafael J. Wysocki wrote:
> On Thursday 22 January 2009, Alan Jenkins wrote:
>   
>> Rafael J. Wysocki wrote:
>>     
>>> On Thursday 22 January 2009, Alan Jenkins wrote:
>>>   
>>>       
>>>> Alan Jenkins wrote:
>>>>     
>>>>         
>>>>> Hibernation hangs just after writing the image.  With s2disk I can see
>>>>> this from the console messages.  The same hang happens with kernel
>>>>> swsusp ('echo disk | sudo tee /sys/power/state'), and I can see that
>>>>> the image has been written from the HDD led.
>>>>>
>>>>> In either case, I can still hard-power-off and resume from hibernation.
>>>>>
>>>>> It doesn't hang if I use the shutdown method (either 'echo shutdown |
>>>>> sudo tee /sys/power/disk' or  's2disk -P "shutdown method=shutdown"').
>>>>>   
>>>>>       
>>>>>           
>>>> I've bisected this to commit 571ff7584bb9e05fca0eb79752ae55a46faf3a98. 
>>>> It doesn't revert cleanly from RC2.
>>>>
>>>> I think it's distinct from the other two reported suspend regressions. 
>>>> I'm not using acpi-cpufreq, and the issue doesn't affect resume.
>>>>     
>>>>         
>>> It looks distinct.
>>>
>>> Do you suspend this box to RAM and does it work?
>>>   
>>>       
>> Yes, I do use STR on it occasionally, and it still works in RC2.
>>
>>     
>>> Please retest with the appended patch applied.
>>>   
>>>       
>> That fixes it.
>>     
>
> OK, it won't hurt to apply it.
>
> Still, the hardware or the BIOS in your box seems to be broken, or both, so I'd
> like to debug it a bit more if you don't mind.
>
> Can you please test the patch below instead of the previous one?
>   

It hangs at the same point as the unpatched RC2.  As before, it doesn't
hang if I use "shutdown" instead of "platform".

Going by sysfs, I have 4 PCI devices without a kernel driver.

8086:2592   Mobile 915 Express Graphics Controller
8086:2792   Mobile 915 Express Graphics Controller (driven by X)
8086:2448   82801 Mobile PCI Bridge
8086:2641   82801FBM (ICH6M) LPC Interface Bridge

Thanks
Alan

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