Re: swsusp and suspend2 like to overheat my laptop

Rafael J. Wysocki
2006-08-09T12:16:27Z

On Wednesday 09 August 2006 13:58, Pavel Machek wrote:
> Hi!
>
> > > Okay, can you try to leave it up for a week or two (no suspends, no
> > > poweroffs) and see what happens?
> >
> > I've had this laptop running for a couple of months without shutting down
> > and it doesn't have a problem. The only time that I do shut it down
>
> Ok.
>
> > > > > P4 has thermal protection, so you are actually safe.
> > > >
> > > > Yeah, but still, the keyboard gets pretty hot too, and I'm actually more
> > > > worried about damaging something that is close by than damaging the CPU
> > > > itself.
> > >
> > > If you damage something, machine was misdesigned in the first place.
> >
> > agreed, but you never know ;) This laptop is currently my lifeline :)
>
> You'd have good reason to get new one.
>
> > > cat we get contents of /proc/acpi/thermal*/*/* ?
> >
> > I'm running after a poweroff (left it running over night in the hotel, and
> > I'm still in the hotel).
> >
> > $ grep . /proc/acpi/thermal_zone/THRM/*
> > /proc/acpi/thermal_zone/THRM/cooling_mode:<setting not supported>
> > /proc/acpi/thermal_zone/THRM/cooling_mode:cooling mode: passive
> > /proc/acpi/thermal_zone/THRM/polling_frequency:<polling disabled>
> > /proc/acpi/thermal_zone/THRM/state:state: ok
> > /proc/acpi/thermal_zone/THRM/temperature:temperature: 48 C
> > /proc/acpi/thermal_zone/THRM/trip_points:critical (S5): 88 C
> > /proc/acpi/thermal_zone/THRM/trip_points:passive: 81 C: tc1=4 tc2=3 tsp=100 devices=0xcf6c2338
> >
> > Note thermal_zone/THRM was finished with bash tab completion so they are
> > the only things that match the above glob expr.
>
> Ok, so it is the bios doing temperature control up-to 81C. At 81C,
> linux should start cooling it, and at 88C, linux should shutdown. At
> little higher temperature, hardware should emergency shutdown.
>
> > > How s2ram works would be useful info.
> >
> > No idea.
>
> Well, try it :-). suspend.sf.net.
>
> > It does look like something isn't setting up the ACPI power properly on
> > resume, and that the CPU is probably in a busy loop while the machine is
> > idle. Just a guess.
>
> Fan is not controlled by ACPI. But we may be saving some memory we
> should not save, or something like that.

If it's a P4, we rather don't, because the ACPI tables should be above the
last pfn in the normal zone. Still, Steven please send your dmesg after a
fresh boot.

Rafael