Bug#643301: [johnmohagan@gmail.com: Re: linux-image-3.0.0-1-rt-amd64: Suspend to ram hangs]
Hello John,
On Thu, Sep 29, 2011 at 12:04:38AM +1000, John O'Hagan wrote:
> On Tue, 27 Sep 2011 14:59:53 +0200
> Uwe Kleine-König <u.kleine-koenig@pengutronix.de> wrote:
> > > On Tue, 27 Sep 2011 00:45:01 -0500
> > > Jonathan Nieder <jrnieder@gmail.com> wrote:
> > > > 3. Since hey, one can be lucky sometimes: is it possible to
> > > > catch the failure as it happens, for example by not suspending
> > > > the console and suspending everything else? See
> > > >
> > > > https://raw.github.com/torvalds/linux/master/Documentation/power/basic-pm-debugging.txt
> > > > https://raw.github.com/torvalds/linux/master/Documentation/networking/netconsole.txt
> > > >
> > > > (or the analagously named files in the linux-doc-3.0.0
> > > > package) for hints in that direction.
> > >
> > > This is a little out of my comfort zone, but I did follow the
> > > procedure in the first link, running the sequential tests with
> > > /sys/power/pm_test. "freezer", "devices" and "platform" tests all
> > > work, the failure occurs with "processors", both for STR and STD.
> > > IFACT from the link, this means the problem is not with a driver but
> > > with processor states? But my laptop only has a single processor
> > > (even though in /sys/devices/system/cpu/ there is cpu0 and cpu1,
> > > only the latter has a file "online" mentioned in the link, is this
> > > relevant?).
> > Did you try adding
> >
> > no_console_suspend
> >
> > to the kernel commandline?
>
> I have now: for STR, the screen goes blank so if the freeze occurs I
> don't get to see any messages. For STD, all messages are normal up to
> and including the one that says the image is being saved (didn't note
> the exact wording), and there it stops.
As netconsole doesn't work on -rt IIRC do you can try using a serial
console?
> Should I go ahead with a report to linux-rt-users as Jonathan has
> advised?
You can try, but I already asked in the linux-rt irc channel and Thomas
has no idea and doesn't seem to be interested to look deeper.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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