port-macppc/41484: NetBSD/macppc 5.0 hangs when detecting FireWire ports on 3nd gen. iMac

[metaridley%mchsi.com@localhost]

>Number:         41484
>Category:       port-macppc
>Synopsis:       NetBSD/macppc 5.0 hangs when detecting FireWire ports on 3nd 
>gen. iMac
>Confidential:   no
>Severity:       critical
>Priority:       low
>Responsible:    port-macppc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun May 24 20:25:00 +0000 2009
>Originator:     Dave Vollenweider
>Release:        5.0
>Organization:
>Environment:
NetBSD ruka.studiolab45.net 5.0 NetBSD 5.0 (GENERIC) #0: Sun Apr 26 22:53:55 
UTC 2009  
builds%b4.netbsd.org@localhost:/home/builds/ab/netbsd-5-0-RELEASE/macppc/200904260229Z-obj/home/builds/ab/netbsd-5-0-RELEASE/src/sys/arch/macppc/compile/GENERIC
 macppc

>Description:
When booting the GENERIC kernel on NetBSD 5.0 on a third-generation iMac 
(slot-loading model), there is a problem with the ieee1394if device, as shortly 
after the start of booting the kernel displays a message about a problem with 
the bus on this device, then the kernel detects the devices on the IDE buses 
and then freezes.  This problem did not exist in previous NetBSD releases.
>How-To-Repeat:
Simply boot the system normally.
>Fix:
A workaround is to boot the kernel with the -c option and disable the 
ieee1394if* device (number 203 in the userconfig list).  Building a custom 
kernel with the same device disabled will also make it work.  Unfortunately 
this means that FireWire support is disabled.