From: Thomas de Grivel <thodg@kmx.io>
Subject: Re: Sysupgrade on i386 vmm to current snapshot hangs on boot into upgrade kernel
To: Alexander Bluhm <bluhm@openbsd.org>
Cc: Brent Cook <busterb@gmail.com>, OpenBSD technical list <tech@openbsd.org>
Date: Thu, 26 Mar 2026 14:34:51 +0100

I could not boot OpenBSD i386 on an amd64 VM, how did you do ?

On Thu, Mar 26, 2026 at 2:18 PM Alexander Bluhm <bluhm@openbsd.org> wrote:
>
> On Thu, Mar 26, 2026 at 12:42:41AM -0500, Brent Cook wrote:
> > I was trying to sysupgrade -s a 7.8 VMM machine to a 7.9 snapshot, but the
> > upgrade hangs on boot, and am not quite sure how to proceed.  Is this
> > something that should work?
> >
> > I can reset the machine and it comes back fine with the old kernel again.
> > The host machine is already running a 6.9 snapshot from this week.
>
> Running OpenBSD i386 as guest in vmm/vmd is quite broken.  Sometimes
> it hangs durign boot soemwhere at "scsibus1 at softraid0: 256
> targets".  But the hang happens not reliably, sometimes the machine
> is runnig fine.  This makes tracking the bug down difficult.
>
> We made some experiments with various versions of the host system
> and the bug is present at least since OpenBSD 7.4.
>
> bluhm
>