linux-kernel - Re: [PATCH V4] cpufreq: suspend governors on system suspend/hibernate

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Message-ID: <87vbz0j55p.fsf@nemi.mork.no>
Date:	Sat, 07 Dec 2013 12:01:54 +0100
From:	Bjørn Mork <bjorn@...k.no>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Patch Tracking <patches@...aro.org>,
	"cpufreq\@vger.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm\@vger.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Nishanth Menon <nm@...com>,
	Stephen Warren <swarren@...dotorg.org>,
	Kgene Kim <kgene.kim@...sung.com>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	linux-tegra@...r.kernel.org, jinchoi@...adcom.com,
	Lan Tianyu <tianyu.lan@...el.com>,
	Sebastian Capella <sebastian.capella@...aro.org>,
	Jonghwan Choi <jhbird.choi@...sung.com>
Subject: Re: [PATCH V4] cpufreq: suspend governors on system suspend/hibernate

Viresh Kumar <viresh.kumar@...aro.org> writes:

> On 29 November 2013 01:59, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>> So I'm reading this as "the version of the patch in bleeding-edge is OK".
>>
>> I hope that really is the case. :-)
>
> Yeah, that's correct.

Sorry to be making noise here again, but I was eager to verify that the
fixes in v3.13-rc3 were OK on my system.  Unfortunately it seems this
patch completely broke suspend for me.  Hibernete ended up with a blank
console and no visible activity, without ever writing any image to disk.

There really weren't that many suspects between v3.13-rc2 and v3.13-rc3,
so I went directly to reverting 5a87182aa21d ("cpufreq: suspend
governors on system suspend/hibernate") which fixed the problem. I
didn't bother debugging it further from there. I don't think there is
anything magic about my system which should make this problem specific
to it.

I am still using the acpi-cpufreq driver on an old x86_64 laptop if that
matters.

Bjørn
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