PCI: multiple domains not supported

Jason Straight jason at jeetkunedomaster.net
Tue Mar 14 20:56:30 UTC 2006

On Tuesday 14 March 2006 15:48, Jason Straight wrote:
> Sorry for the cross post but this may pertain to dapper too.
> Trying to install breezy on a new HP dual opteron system I get as far as
> the kernel message:
> PCI: Multiple domains not supported
> According to the only informative article I could find on this:
> http://archives.mandrivalinux.com/cooker/2006-02/msg02462.php
> From the Mandriva post:
> Installation fails on systems that have multiple PCI domains on the
> mainboard. The reason is that there has been no support in the 'stock'
> linux kernel for the x86 arch until recently.
> Support for multiple PCI domains on the x86 architecture is needed for
> compatibility with current and future computer mainboards.
> Background, available fixes, etc:
> Multiple PCI domains are also known as segments by ACPI. These are used by
> newer mainboards for support of the multiple types of PCI bus that now
> exist on
> the x86 arch, including the PCIe (which is not a real bus).
> [SNIP]
> However, note that (k)Ubuntu uses the single CPU kernel for initial
> installation and it failed also with the same error for both 32 & 64-bit
> versions of the 'hoary' and 'breezy' releases.
> On the other hand, I also tried a "live" SuSE DVD, which uses a non-smp
> kernel,
> and it runs in much the same way as the CentOS, i.e., good but in a reduced
> capacity.
> Support for multiple PCI domains for the x86 arch is needed as soon as
> possible
> to insure compatibility for installation and use of this linux OS.

Wouldn't you know 2 seconds after I hit send it occurs to me to turn off ACPI 
routing in the kernel and viola.

| Jason Straight
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