linux-kernel - Re: [2.6.23] IBM X41 looses time after Suspend2Disk

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Message-ID: <20071030210801.GA1767@elf.ucw.cz>
Date:	Tue, 30 Oct 2007 22:08:01 +0100
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-pm@...ts.linux-foundation.org,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [2.6.23] IBM X41 looses time after Suspend2Disk

On Tue 2007-10-30 09:35:37, Philipp Matthias Hahn wrote:
> Hello Rafael, Pavel!
> 
> Thank you both for the fast help.
> 
> On Mon, Oct 29, 2007 at 10:05:10PM +0100, Rafael J. Wysocki wrote:
> > On Monday, 29 October 2007 21:19, Philipp Matthias Hahn wrote:
> > > I have an IBM X41 tablet pc running 2.6.23 with the following problem:
> > > Suspend2Ram work fine, but when I do a Suspend2Disk (echo disk >
> > > /sys/power/state), the notebook hangs showing the following lines:
> ...
> > >         Suspending console(s)
> > > 
> > > When I repeatedly press some keys or move the TrackPoint, the SwSusp
> > > continues and the notebook powers off.
> > > On reboot, the notebook resumes but hangs showing the following screen:
> ...
> > >         Suspending console(s)
> > > 
> > > Generating interrupts by pressing keys or moving the TrackPoints makes
> > > the resume continue. But after that, the notebook looses time, xterms
> > > don't get updated until I press a key, the beeper beeps until I press a
> > > key, etc.
> ...
> > Please try to do "echo shutdown > /sys/power/disk" before hibernation and
> > see what happens.
> 
> I'm already doing that.
> 
> > Also, is it an SMP kernel or UP?
> 
> UP.
> 
> 
> On Mon, Oct 29, 2007 at 10:24:14PM +0100, Pavel Machek wrote:
> > Yep, I seen that before. Try "nohz=off".
> 
> Okay, that seems to solve the "timer loosing time after resume" problem.
> 
> 
> But I still need to press some keys on suspend (7-12 key presses and
> releases) to unhang it. On resume not key presses are needed any
> more.

So it fixed resume but not suspend? strange. Try highres=off, too. And
maybe irqpoll?

You may want to try cpu hotplug separately...

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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