Hi. On Sat, Feb 22, 2020 at 12:53:38PM +0000, Mark Raynsford wrote: > I've rebooted the VM several times, so it's definitely not a case of > running the wrong kernel. > > # uname -a > Linux bloodorange.int.arc7.info 4.9.0-9-amd64
And yet it is a case of running a wrong kernel. You see, buster's kernel currently has version 4.19.0-8, but yours (4.9.0-9) looks like an outdated stretch one. And you do have a kernel 4.9, but you don't have the modules for it. You do have a kernel 4.19 (with the modules), but you do not boot it. > Is there some special magic I need to do to get the right kernel > modules? I'd start by fixing a bootloader (GRUB, most probably), because whatever it boots it's not the kernel that Debian gives you in a buster. Reco