linux-kernel - Re: linux-next: Tree for June 13: IO APIC breakage on HP nx6325

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Message-Id: <200806261037.20108.rjw@sisk.pl>
Date:	Thu, 26 Jun 2008 10:37:19 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@...e.cz>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Ingo Molnar <mingo@...e.hu>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Len Brown <lenb@...nel.org>
Subject: Re: linux-next: Tree for June 13: IO APIC breakage on HP nx6325

On Tuesday, 24 of June 2008, Pavel Machek wrote:
> Hi!
> 
> > > What does ACPI claim the trip points are set to in this case? On the 
> > > 6125, if IRQ 2 is enabled in the APIC then the DSDT sets all the thermal 
> > > trip points to 16 degrees C. I suspect this means that enabling IRQ 2 is 
> > > the wrong thing to do on this chipset.
> > 
> > Ah, indeed, thanks for the hint.  This is the output of
> > 
> > $ cat /proc/acpi/thermal_zone/TZ*/trip_points
> > 
> > in the failing case:
> > 
> > critical (S5):           105 C
> > passive:                 16 C: tc1=1 tc2=2 tsp=100 devices=C000 C001 
> > active[0]:               16 C: devices=C34F 
> > active[1]:               16 C: devices=C350 
> > active[2]:               16 C: devices=C351 
> > active[3]:               16 C: devices=C352 
> > critical (S5):           100 C
> > passive:                 16 C: tc1=1 tc2=2 tsp=300 devices=C000 C001 
> > critical (S5):           100 C
> > passive:                 16 C: tc1=1 tc2=2 tsp=300 devices=C000 C001 
> 
> Can we call the ACPI BIOS to be terminally broken at this point?

It is broken, but the configuration worked before the patch.  Consequently,
the patch introduces a regression.

Thanks,
Rafael
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