Re: ACPI PCI routing problem

[Ducrot Bruno <ducrot-kk6yZipjEM5g9hUCZPvPmw@public.gmane.org>]

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.


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