install/43954: 5.1 RC4 Installation CD doesn't work on IBM R31 - exec /sbin/init: error 2

[mattofransen%gmail.com@localhost]

>Number:         43954
>Category:       install
>Synopsis:       5.1 RC4 Installation CD doesn't work on IBM R31 - exec 
>/sbin/init: error 2
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Oct 08 19:25:00 +0000 2010
>Originator:     Matto Fransen
>Release:        5.1 RC4 i386
>Organization:
>Environment:
>Description:
See also problem #43065

I downloaded the installation iso from ftp.nl.netbsd.org.

At booting the installation CD (both with and without ACPI) early in the 
booting process (characters are still white) there is a warning cant load 
/stand/i386/5.1/modules/something, where "something" is a bunch of garbled 
characters. The boot process goes on and green characters appear showing 
bootmessages. It ends with:

...
warning: no /dev/console
exec /sbin/init: error 2
init: trying /sbin/oinit
exec /sbin/oinit: error 2
init: trying /sbin/init.bak
exec /sbin/init.bak: error 2

Running `load miniroot.kmod` before booting gives the same result.

This also happens with the 5.0.2 installation CD. 
The 4.0.1. installation CD works fine on this laptop.

Hardware: IBM Thinkpad R31 with BIOS 1.270 and 256 Mb RAM.
After installing 4.0.1 I did a demsg, see
http://box.matto.nl/downloads/dmesg-r31-netbsd-4.0.1

>How-To-Repeat:
Boot from installation CD where version is 5.0.2 or 5.1 RC4
>Fix: