False alarm. The answer is given here:
https://forums.virtualbox.org/viewtopic.php?f=7&t=105468
In my case after exiting QEMU-KVM virt-manager the qemu-system-x86 and
kvm-nx-lpage-re processes remain live. Since only one hypervisor is
active at a time the fix is to simply kill these processes when QEMU-KVM
is not in use - and the VirtualBox VMs start just fine. Hope this helps
someone else who might get tripped up by this.
On Fri, 29 Apr 2022 11:57:02 -0700 nbi <nbi.ve...@gmail.com> wrote:
> You upgraded to 6.1.34-dfsg-2 from what? 6.1.32 or an earlier version?
> How did you upgrade? dpkg, apt, or Synaptic?
>
> On Tue, 26 Apr 2022 03:24:46 +0300 Alexander Kernozhitsky
> <sh200...@mail.ru> wrote:
> > Hello,
> >
> > I just upgraded to 6.1.34-dfsg-2, and for me everything worked fine,
> guest
> > systems start normally.
> >
> > Did you try to downgrade the package and ensure that the bug is done
> after
> > downgrade?
> >
> > --
> > Alexander Kernozhitsky
> >
> >
> >
> >
>
>
>
