linux-kernel - Re: [REGRESSION 3.10.1] System does not wake up from suspend

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Message-ID: <51E39BAB.4060308@linux.vnet.ibm.com>
Date:	Mon, 15 Jul 2013 12:20:19 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	Sören Brinkmann <soeren.brinkmann@...il.com>
CC:	Willy Tarreau <w@....eu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Subject: Re: [REGRESSION 3.10.1] System does not wake up from suspend

On 07/15/2013 10:24 AM, Willy Tarreau wrote:
> On Sun, Jul 14, 2013 at 09:36:25PM -0700, Sören Brinkmann wrote:
>> Hi Greg,
>>
>> since upgrading to 3.10.1 I find my system not waking up from suspend
>> from time to time. Unfortunately, I couldn't figure out how to reliably
>> reproduce the issue. Sometimes it works just fine.
>>
>> All I know so far:
>> On 3.10 I had my system completely freezing a few times. But that did
>> not seem to be related to suspend/resume. I never experienced the
>> behavior described below on 3.10.
>>
>> On 3.10.1 I hit this bug a few times, that my system did not wake up.
>> I.e. the screen stayed black and the power LED kept flashing. But
>> nothing brought the system back up and I had to longpress power to reset
>> the system.
>> I had none of the system freezes like the ones described above anymore.
> 
> Fortunately, 3.10.1 is very small. The only patch it contains which is
> related to suspend is 18/19 (cpufreq ondemand governor). Maybe you're
> having a problem with cpufreq on this machine in fact.
> 
> You may want to try to force it to performance mode or powersave mode
> and try for a while, it is possible that both 3.10 and 3.10.1 will work
> fine.
> 

Or, you could try applying the patch shown below on top of 3.10.1 and
see if it fixes the suspend/resume regression for you.

https://lkml.org/lkml/2013/7/11/661

(Just apply patch 1, not the entire patchset).
 
Regards,
Srivatsa S. Bhat

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