kern/57526: Kernel panic on ThinkPad W530 with discrete graphics enabled

[mdehling%gmail.com@localhost]

>Number:         57526
>Category:       kern
>Synopsis:       Kernel panic on ThinkPad W530 with discrete graphics enabled
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jul 14 00:55:00 +0000 2023
>Originator:     Malte Dehling
>Release:        NetBSD 10.0_BETA
>Organization:
>Environment:
NetBSD w530.local 10.0_BETA NetBSD 10.0_BETA (GENERIC) #0: Tue May 16 16:27:44 UTC 2023  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
Trying to boot with discrete graphics enabled in the BIOS results in a kernel panic:

nouveau0: NVIDIA GK107 (0e73c0a2)
nouveau0: error: bios: unable to locate usable image
nouveau0: bios ctor failed, -22
nouveau0: unable to create nouveau device: 22
panic: cnopen: no console device
[...]

My W530 has an NVIDIA K1000M graphics card.

(As a side note: I have tried sending messages about this and other issues recently to the current-users mailing list and they didn't go through.)
>How-To-Repeat:
Enable discrete graphics in BIOS, boot NetBSD.
>Fix: