Re: Unreliable hibernation on Lenovo x230 (regression)

joeyli
2015-04-02T17:22:56Z

On Fri, Apr 03, 2015 at 12:50:54AM +0800, joeyli wrote:
> Hi,
>
> On Thu, Apr 02, 2015 at 05:28:05PM +0200, Pavel Machek 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
>
> Before revert 84c91b7ae patch, please check does there have log similar as
> following in dmesg when hibernate resume fail?
>
> [ 24.349777] PM: 0xab9bc000 in e820 nosave region: [mem 0xab9bc000-0xab9c2fff]
>
> The address may different, by you should see "e820 nosave region" log. Otherwise
> we got another problem.
>

Forgot to mention, please add "debug no_console_suspend=1 loglevel=9" to kernel
parameter then try to reproduce issue and look at dmesg.

Thanks a lot!
Joey Lee