Re: Re: Possible quick fix for ACPI routing problem on Nforce2

[Jurriaan <thunder7-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org>]

From: Andrew de Quincey <adq_dvb-fmPXVN3awWJAJAzL26g0SA@public.gmane.org>
Date: Sun, Jul 13, 2003 at 02:18:44AM +0100
> Hi, I've been playing about with this, and I've found what is happening.
> I've not yet tracked down the reason yet, but if anyone else has this
> problem, can they try please this fix to see if it is consistent.
> 
> Anyway, IRQs > 15 get set to Active low/Level Sensitive in the IO-APIC on
> my board.
> 
> The fix (No patch as this is NOT a proper fix):
> Edit arch/i386/kernel/io_apic.c
> Find the function io_apic_set_pci_routing() (its the last one in 2.5.74).
> Change the line:
> entry.polarity = 1;         /* Low active */
> 
> To:
> entry.polarity = 0;         /* High active */
> 
> For me, this makes everything work fine. Originally, I also forced these
> IRQs to be edge sensitive, but leaving them at level seems to work fine as
> well.
> 
No joy on VIA KT400 chipset (bugzilla #678): ide0 get's IRQ 17, during
boot multiple oopses occur, starting with 'IRQ 17: nobody cared' right
after probing hda. Eventually it crashes hard, after probing hde.

Thanks,
Jurriaan
-- 
Pay attention, the wreckage seemed to declare. Some things cannot be
undone, short of time pivoting in its groove and crawling back on itself.
	Tad Williams - Otherland
Debian (Unstable) GNU/Linux 2.5.75 4112 bogomips load av: 1.06 0.44 0.16


-------------------------------------------------------
This SF.Net email sponsored by: Parasoft
Error proof Web apps, automate testing & more.
Download & eval WebKing and get a free book.
www.parasoft.com/bulletproofapps1