Re: ACPI PCI routing problem

Ducrot Bruno
2003-07-11T12:51:26Z

On Fri, Jul 11, 2003 at 12:43:34PM +0100, Andrew de Quincey wrote:
> On Friday 11 July 2003 11:14, Ducrot Bruno wrote:
> > On Fri, Jul 11, 2003 at 12:22:29AM +0100, Andrew de Quincey wrote:
> > > Hi, I have an Epox 8RDA+ NForce2-based motherboard (uniprocessor, Athlon
> > > XP). This board has an IO-APIC with 0x17 pins. I can't tell you much more
> > > specific about it, as it is in the nforce2 chipset to which I do not have
> > > docs. I'm using kernel 2.5.74, with APIC, IO-APIC, ACPI turned on.
> > >
> > > First of all, here are the symptoms:
> > >
> > > Kernel boots OK, devices with IRQs <=15 are fine. However, the system
> > > attempts to allocate some devices (e.g. USB) to IRQs 20 and 21, as told
> > > by the AML code in my BIOS (more on this later).
> >
> > How look /proc/interrupts with IO-APIC, but without ACPI (I mean, no
> > acpi at all at compile time)?
>
> Hi, here you go. ACPI disabled, but APIC/IO-APIC left in. Interesting,
> everything is set to XT-PIC....
>
> During boot it says: Found and enabled local APIC!
> But does not have any mention of the IO-APIC.
>
> CPU0
> 0: 50946 XT-PIC timer
> 1: 16 XT-PIC i8042
> 2: 0 XT-PIC cascade
> 11: 13 XT-PIC ohci-hcd
> 12: 346 XT-PIC ohci-hcd
> 14: 1024 XT-PIC ide0
> 15: 18 XT-PIC ide1
> NMI: 0
> LOC: 50874
> ERR: 91
> MIS: 0
>
>

Then perhaps you may turn off IO-APIC. I know there are troubles
with some SiS based system. Though, it may be problematic with
NForce2 as well?

A Guru of that kind of stuff should help more than me (Alan perhaps?).

--
Ducrot Bruno

-- Which is worse: ignorance or apathy?
-- Don't know. Don't care.