Re: How to specify PCI IRQ?

From: Alex Butcher (alex.butcher.news0204_at_assursys.co.uk)
Date: 02/26/04 

Date: Thu, 26 Feb 2004 20:01:41 +0000

On Thu, 26 Feb 2004 13:31:03 +0000, Tony Mountifield wrote:

> In article <slrnc3rmg5.85j.mjg59@kern.srcf.societies.cam.ac.uk>,
> Matthew Garrett <mjg59-uk.comp.os.linux@srcf.ucam.org> wrote:
>> In article <c1kkp2$4fu$1@softins.clara.co.uk>, Tony Mountifield wrote:
>>
>> > I tried moving the card to slot 4 and slot 5, and in each case it still
>> > ended up on IRQ11, sharing with the on-board Ethernet and USB.
>> >
>> > Under Win2k, the card also shows up on IRQ11, but the on-board Ethernet
>> > and USB controllers are shown as IRQ20. 20???
>> >
>> > I'd *really* like to understand what decisions the software makes based
>> > on what data, but I still haven't found such information yet.
>>
>> Is your kernel built with IO-APIC support? If you have ACPI (something
>> completely different) support built in, have you tried booting with
>> pci=noacpi ?
>
> No, I haven't, but will certainly give it a try. It's a stock Fedora
> kernel, so I don't know what options it was built with.

IIRC, the Fedora kernel is built with both APM and ACPI included, but both
disabled by default (i.e. you're probably already using the equivalent of
pci=noacpi already). Try switching ACPI *on* by booting the kernel with
"acpi=on" as an extra parameter.

> But this is the problem - people suggest things to try, which I appreciate
> very much, but where can I learn about the "why" myself? Recommendations
> of websites, books, etc. would be very welcome.

The Fedora/Red Hat documentation and release notes are usually pretty
handy. After that, googling USENET is usually a good way to start.

> Cheers,
> Tony

Best Regards,
Alex. 

-- 
Alex Butcher      Brainbench MVP for Internet Security: www.brainbench.com
Bristol, UK                      Need reliable and secure network systems?
PGP/GnuPG ID:0x271fd950                         <http://www.assursys.com/>

Relevant Pages

  • Re: mplayer
    ... >> why hasn't this been built into the fedora kernel as of yet?? ... I thought Fedora Core 2 included apt in it, ...
    (Fedora)
  • Re: adaptec controller
    ... > keep getting theese lost interrupt errors when booting from the cd. ... > which SATA controller would you suggest for the fedora distribution? ... From what I could find out it is a bug in Kernel ...
    (Fedora)
  • Using FC5 X server with a vanilla Kernel
    ... and I'm using the X server without problem when booting ... Fedora Kernel 2.6.16-1.blah... ...
    (Fedora)
  • Re: Kernel source
    ... I just built the uvcvideo driver with only kernel-devel installed, ... If you do need the full kernel source, the fedora 7 release notes ...
    (Fedora)
  • Panic when booting FBSD 6.2 after upgrading from FBSD 5.5
    ... I fetched the FBSD 6.2 sources, built and installed a new world and a ... Booting the new kernel, ... After that I built a GENERIC kernel the ...
    (comp.unix.bsd.freebsd.misc)