Hi Matthieu, > > There are some bios that disable the vga device when there is no > monitor connected. If you can find a dummy plug it may be enough > to get a device attached. > I've at least one intel NUC with this kind of behaviour, but have also > seen it on other motherboards.
You nailed it. Just hooking a monitor up to the system fixed the problem: quirm# uname -mrsv OpenBSD 7.6 GENERIC.MP#338 amd64 quirm# Thanks, Frank.