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

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Date:	Mon, 15 Jul 2013 19:12:05 -0700
From:	Sören Brinkmann <soeren.brinkmann@...il.com>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Cc:	Willy Tarreau <w@....eu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION 3.10.1] System does not wake up from suspend

On Mon, Jul 15, 2013 at 12:20:19PM +0530, Srivatsa S. Bhat wrote:
> 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).
Thanks for your answers. I'll give this one a shot and fall back to
forcing a different cpufreq governor if it doesn't help.

	Sören

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