In the original bug description I mentioned, I booted from a boot.iso
taken from the autobuilder's snapshot.
This is the link to it:

ftp://ftp.netbsd.org/pub/NetBSD-daily/HEAD/200708190002Z/i386/installation/cdrom/boot.iso

I just realized, that the kernel used therein looks very old or is somehow
garbarged (although it is prints the latest kernel version 4.99.29). It does not even recognize the AMD PCI vendor and product ids. But the ids are in the kernel for a long time.
May it be, that sysinst in the ramdisk is also very old or garbaged?


-- 
Greetings,

Christoph