From: johnohagan <mail@johnohagan.com>
To: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: linux-rt-users@vger.kernel.org,
Jonathan Nieder <jrnieder@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: 3.0.0-1-rt-amd64: Suspend hangs
Date: Thu, 6 Oct 2011 02:01:52 +1100 [thread overview]
Message-ID: <20111006020152.e7b0c625e5cc4c707a601420@johnohagan.com> (raw)
In-Reply-To: <20111003191452.GK6949@pengutronix.de>
On Mon, 3 Oct 2011 21:14:52 +0200
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> wrote:
> Hello John,
>
> On Fri, Sep 30, 2011 at 01:01:28AM +1000, johnohagan wrote:
> > Running Debian testing on an HP Mini 5102 with non-RT kernel,
> > suspend to ram, suspend to disk and resume work as expected. With
> > the RT kernels from both testing and Sid, attempting to suspend may
> > result in a lock-up, with a blank screen and high fan operation.
> > Keyboard and Sysrq keys are unresponsive and a hard shutdown is
> > necessary. This happens randomly AFAIKT, of the order of half the
> > time, possibly more often if larger programs are running, but still
> > occurs in single-user mode.
> >
> > I ran the tests using /sys/power/pm_test described here:
> > https://raw.github.com/torvalds/linux/master/Documentation/power/basic-pm-debugging.txt
> >
> > The freeze occurs with pm_test set to "processors", but not with
> > "platform".
> Can you please test the following two things:
>
> - Can you reproduce with the kernel parameter:
>
> maxcpus=1
Aha! When booted this way, I can't reproduce the problem. Suspend works.
> ?
> - Does onlining/offlining of the 2nd cpu work reliably? That is:
>
> echo 0 > /sys/devices/system/cpu/cpu1/online
> echo 1 > /sys/devices/system/cpu/cpu1/online
I can successfully execute those commands without error, but as my laptop has only one cpu, I'm not sure what that means.
> Best regards
> Uwe
>
> --
> Pengutronix e.K. | Uwe
> Kleine-König | Industrial Linux Solutions
> | http://www.pengutronix.de/ |
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prev parent reply other threads:[~2011-10-05 15:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-29 15:01 3.0.0-1-rt-amd64: Suspend hangs johnohagan
2011-09-29 19:31 ` Uwe Kleine-König
2011-09-30 9:48 ` Jonathan Nieder
2011-10-03 19:14 ` Uwe Kleine-König
2011-10-05 15:01 ` johnohagan [this message]
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