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From: rhn <kebuac.rhn@porcupinefactory.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: rhn <kebuac.rhn@porcupinefactory.org>,
	kernel list <linux-kernel@vger.kernel.org>,
	joeyli.kernel@gmail.com, linux-pm@vger.kernel.org,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>
Subject: Re: Unreliable hibernation on Lenovo x230 (regression)
Date: Fri, 3 Apr 2015 17:58:25 +0200	[thread overview]
Message-ID: <20150403175825.79816fea@porcupinefactory.org> (raw)
In-Reply-To: <20150402152805.GA17021@amd>

On Thu, 2 Apr 2015 17:28:05 +0200
Pavel Machek <pavel@ucw.cz> wrote:

> On Wed 2015-04-01 21:47:43, rhn wrote:
> > Hello,
> > 
> > Between kernel 3.16 and 3.17, a regression has been introduced where the first hibernation after regular shutdown always fails to resume. Subsequent hibernations succeed.
> > 
> > The system is a Lenovo x230 with Intel i5, booting with EFI, with the hibernate partition located on a secondary SSD drive. Installed system is Fedora 20, hibernation and reboots were issued using the KDE shutdown dialog.
> > 
> > I have tracked the problem to first appear in the commit
> > e67ee10190e69332f929bdd6594a312363321a66	Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle'
> > 
> > The problem itself manifests in dmesg as follows (system was first
> > restarted, then hibernated - this log is from the subsequent
> resume):
> 
> Ok, can you try to disable cpufreq and cpuidle, and then try if it
> reproduces?
> 
> At that point, this is the candidate:
> 
> commit e67ee10190e69332f929bdd6594a312363321a66
> Merge: 21c806d 84c91b7 39c8bba 372ba8c
> Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Date:   Mon Aug 11 23:19:48 2014 +0200
> 
>     Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle'
> 
>     * pm-sleep:
>           PM / hibernate: avoid unsafe pages in e820 reserved regions
> 
> ...
> Alternatively, you can just try to revert
> 
> commit 84c91b7ae07c62cf6dee7fde3277f4be21331f85
> Author: Lee, Chun-Yi <joeyli.kernel@gmail.com>
> Date:   Mon Aug 4 23:23:21 2014 +0800
> 
>     PM / hibernate: avoid unsafe pages in e820 reserved regions
> 
>     When the machine doesn't well handle the e820 persistent when
>     hibernate
>         resuming, then it may cause page fault when writing image to
>     snapshot
>         buffer:
> 
> 
> ...
> 
> Thanks,
> 									Pavel

I tried to disable CONFIG_CPU_IDLE and CONFIG_CPU_FREQ, however for some reason I could only disable CONFIG_CPU_FREQ.

The bug persisted.

Reverting the commit 84c91b7 on top of e67ee10 fixes the problem.

I created a copy of the bug report here: https://bugzilla.kernel.org/show_bug.cgi?id=96111

Cheers,
rhn

  parent reply	other threads:[~2015-04-03 15:58 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20150401214743.20fbe2c5@porcupinefactory.org>
2015-04-02 15:28 ` Unreliable hibernation on Lenovo x230 (regression) Pavel Machek
2015-04-02 16:50   ` joeyli
2015-04-02 17:22     ` joeyli
2015-04-02 18:12       ` rhn
2015-04-03  1:23         ` joeyli
2015-04-03 16:00           ` rhn
2015-04-03 15:58   ` rhn [this message]
2015-04-03 16:40     ` Pavel Machek
2015-04-03 21:43     ` Rafael J. Wysocki
2015-04-04  8:12       ` rhn
2015-04-05  7:24         ` joeyli
2015-04-05  7:51           ` Yinghai Lu
2015-04-06  7:12             ` Ingo Molnar
2015-04-05  7:26       ` joeyli
2015-04-06 23:28         ` Rafael J. Wysocki

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