From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: Re: linux-next: Tree for June 13: IO APIC breakage on HP nx6325 Date: Fri, 20 Jun 2008 13:27:14 +0100 Message-ID: <20080620122714.GA9332@srcf.ucam.org> References: <20080613232214.394fd6fd.sfr@canb.auug.org.au> <200806201353.59083.rjw@sisk.pl> <20080620115714.GC8637@srcf.ucam.org> <200806201422.12659.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <200806201422.12659.rjw@sisk.pl> Sender: linux-acpi-owner@vger.kernel.org To: "Rafael J. Wysocki" Cc: "Maciej W. Rozycki" , Ingo Molnar , Stephen Rothwell , linux-next@vger.kernel.org, LKML , Thomas Gleixner , ACPI Devel Maling List , Len Brown List-Id: linux-next.vger.kernel.org On Fri, Jun 20, 2008 at 02:22:11PM +0200, Rafael J. Wysocki wrote: > Ah, indeed, thanks for the hint. This is the output of Right. My recollection of this is somewhat hazy, so here's something I wrote a couple of years ago: "If you dig through the DSDT code for the 6125, you'll find a bit where it writes 0x14 to 0xfec00000 and then checks whether offset 0x12 from there is 1. In other words, it's checking if pin 2 of the io-apic is masked. If it's not masked (that is, offset 0x12 is 0 and irq 2 is enabled) it sets another bit in a register. This is then checked by the thermal zone code which as a result sets the thermal trip temperatures to 16 degrees Celsius. This bites when the acpi_skip_timer_override option is used in Linux." I have no idea what this code is for, but it's pretty clear that Windows sets it up in such a way that this isn't true. -- Matthew Garrett | mjg59@srcf.ucam.org