Hi!
> > > > For the
> > > > upstream kernel, I think it is more appropriate to expose and fix
> > > > the fundamental problems. For distro kernels, I'm less concerned
> > > > if you hide bugs instead of fixing them.
> > >
> > > This is okay as long as you are willing to work around the fundamental
> > > problems in kernel. You are unable to _fix_ them. They are broken
> > > BIOSes.
> >
> > The thing Linux needs to figure out is why Windows doesn't
> > get confused by what Linux claims to be broken BIOS.
>
> Why do you assume that Windows work? Yes, they probably will not have
> 'machine runs at 50% speed' problem, but I'd be very surprised if
> critical shutdown worked properly on more than 90% of notebooks....
>
> > So far I have one live sighting to be addressed by
> > the upstream kernel (from Knut). I'm certainly looking
> > forward to the 2nd live sighting...
>
> Ok, I guess I should steal that old xe3 I was talking about...
Done, xe3 was re-built from parts.
/proc/acpi/.../trip_points:
critical (S5): 100 C
passive: 83 C...
active[0]: 100 C...
(hmm, active=critical? Interesting. Fortunately fan seems to be driven
by BIOS).
Temperature is ~63 C in "normal" use. Now lets simulate fan failure...
and lets load the cpu...
temperature slowly rises, 1min00 -- 72C, 1min15 -- 75C, 1min30 --
77C, 1min45 -- 80C, 1min00 -- 82C, 1min15 -- 83C, 1min45 -- sudden
powerdown, presumably because of hardware failsafe.
So we have two bugs here: machine should have attempted to use passive
cooling sooner, so that critical temperature would not be reached, and
machine should have attempted shutdown before hardware failsafe killed
the power. I could do both in 2.6.21, with echo of new trip points and
enable of polling.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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