panic: probing for non-PCI bus

John Baldwin jhb at
Wed Nov 12 08:30:55 PST 2003

On 12-Nov-2003 John Hay wrote:
>> > Hmmm, I'll have to open it up to see if it has an AGP slot, but it is in
>> > the server room at work. :-/ Here is a dmesg with a kernel of about Nov 3.
>> > 
>> > pcib1: <PCI-PCI bridge> at device 1.0 on pci0
>> > pci1: <PCI bus> on pcib1
>> Ok, no AGP bus, but you do have a PCI bus that the MP Table doesn't know about.
>> I'll commit a fix.  Note that your system isn't going to work with ACPI.  Perhaps
>> there is a BIOS option to set the interrupt model to APIC rather than PIC that
>> might fix the ACPI case.
> Ok, I opened the machine this morning and it does have an AGP slot.
> I also had a look in the BIOS setup, but didn't see anything to change
> the interrupt model. The closest I saw was:
> MPS 1.4 Support - Enabled/Disabled (Enabled)
> PCI 2.1 Support - Enabled/disabled (Enabled)
> PNP OS Installed - No/Yes (No)
> I built a new kernel with your mptable changes included and with acpi
> enabled, it would panic, but the onboard scsi interrupt doesn't work,
> so you don't get very far. With acpi disabled, it seems to work fine,
> although I haven't done much yet. So it looks like I'm up and running
> again, thanks.

Yes, your BIOS doesn't include any interrupt routing information in ACPI
for using APICs, so your machine isn't going to work with ACPI and
'device apic'.


John Baldwin <jhb at>  <><
"Power Users Use the Power to Serve!"  -

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