ACPI breakage

From: Tim Robbins <tjr_at_freebsd.org>
Date: Fri, 21 May 2004 21:21:16 +1000
Hi,

On trying to boot a recent CURRENT kernel on one of my machines (i386 kernel,
Pentium III (Katmai) 500 MHz CPU, Abit BH6 motherboard), I get a panic:
...
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <ACPI PCI bus> on pcib1
pcib0: slot 1 INTA is routed to irq 12
pcib1: slot 0 INTA is routed to irq 12

Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x15

(Unfortunately this was transcribed by hand and does not show bootverbose
output or a backtrace. I can't provide these right now.)

With an identical source tree, I *don't* get a panic on another system
(amd64 kernel, Athlon 64 3000+ CPU, ASUS K8V Deluxe motherboard ver. 1005)

Reverting to sys/dev/acpica/acpi_ec.c revision 1.47 makes the panic disappear.
In case it's useful, this is what the dmesg looks like with the old
version of acpi_ec.c:
...
pcib1: <PCI-PCI bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pcib0: slot 1 INTA is routed to irq 12
pcib1: slot 0 INTA is routed to irq 12
pci1: <display, VGA> at device 0.0 (no driver attached)
isab0: <PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
...

The only interesting difference I can see here is that pci1 has gone
from being a "PCI bus" with rev. 1.47 to an "ACPI PCI bus" with rev. 1.49.
pci0 always shows up as an "ACPI PCI bus".

Suggestions? I would try to debug this a little further myself, but as
the machine in question acts as my dialup gateway, it's rather inconvenient
to reboot it often or take it offline.


Tim
Received on Fri May 21 2004 - 02:21:20 UTC

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