kern/49811: DRMKMS kernels can not boot with -a

[martin%NetBSD.org@localhost]

>Number:         49811
>Category:       kern
>Synopsis:       DRMKMS kernels can not boot with -a
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 03 18:05:00 +0000 2015
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.7
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 7.99.7 NetBSD 7.99.7 (NIGHT-OWL) #315: Fri Mar 20 08:14:21 CET 2015 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL amd64
Architecture: x86_64
Machine: amd64
>Description:

For some reasons (I still have to explore) my notebook bios is unhappy when
trying to boot a amd64 iso image dd'd to a usb stick.

For testing I copied over the kernel from the cd9660 root partition of the
image to the hard disk and booted that with -a.

At the root device prompt I answered sd0a and expected it to fire up
sysinst.

However, the -a boot makes radeon unhappy: it can not load the firmware
before mounting root, and after mounting root it crashes as soon as the
console device is opened.

>How-To-Repeat:

boot with -a on a system using radeon?

>Fix:
n/a