Re: kern/59721: qemu VM's blackscreen over VNC wth -machine q35

["Taylor R Campbell via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/59721; it has been noted by GNATS.

From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
To: Roy Marples <roy%marples.name@localhost>,
	Michael van Elst <mlelstv%serpens.de@localhost>,
	Martin Husemann <martin%duskware.de@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, netbsd-bugs%NetBSD.org@localhost
Subject: Re: kern/59721: qemu VM's blackscreen over VNC wth -machine q35
Date: Mon, 27 Oct 2025 00:19:19 +0000

 Upstream bug report:
 
 Black screen in Windows XP
 https://gitlab.com/qemu-project/qemu/-/issues/2608
 
 > This can be reduced to:
 >=20
 > ./qemu-system-x86_64 -machine q35,smm=3Doff,accel=3Dkvm -vga std -cdrom w=
 inxp.iso
 >=20
 > The key here is smm=3Doff.  Without it, the thing just works.
 >=20
 > The behavior change has been introduced by (bisection points to)
 > commit b07bf7b7 (before this commit, winXP guest shows text-mode
 > output fine, after - only graphics mode is shown).