kern/46380: NetBSD 6.0 Beta freezes while loading acpi even with 'boot -1'

[garbytrash%gmail.com@localhost]

>Number:         46380
>Category:       kern
>Synopsis:       NetBSD 6.0 Beta freezes while loading acpi even with 'boot -1'
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Apr 25 17:35:00 +0000 2012
>Originator:     zenny
>Release:        8.0 Beta
>Organization:
http://thehumanape.org
>Environment:
NetBSD 6.0 beta (could not output uname -a because it froze while trying to 
boot)
>Description:
Tried to run NetBSD 6.0 Beta (downloaded from 
ftp://ftp.dk.netbsd.org/pub/NetBSD/iso/6.0_BETA/NetBSD-6.0_BETA-amd64.iso) on a 
qemu vm in ubuntu 10.04 with tap device. 

Boot freezes at ACPI CPU stage.

Even tried with 'boot -1' as advised here: 
http://www.mentby.com/Group/netbsd-users/netbsd-6-amd64-beta-iso-sysinst-halts.html,
 but, in my case, still freezes at ACPI CPU loading stage.

>How-To-Repeat:
Install NetBSD 6 Beta in qemu vm in ubuntu 10.04 (lucid) and start the machine 
with a command like:

$ sudo qemu-system-x86_64 -m 256 -net tap -net nic -cdrom 
/backup/Downloads/iso/NetBSD-6.0_BETA-amd64.iso -drive 
file=netbsd6.qcow2,index=0,cache=writeback,media=disk -boot d
>Fix:
The one described (boot -1) in 
http://www.mentby.com/Group/netbsd-users/netbsd-6-amd64-beta-iso-sysinst-halts.html
 didn't work in my case, so unable to output the uname -a message and dmesg, 
too.