Created attachment 870854 [details]
dmesg output after trying to start a VirtualBox VM

Machine: DELL Precision 5680

In order to get sound on this machine running, I was forced to install
a contemporary kernel (6.6.0-lp155.8) from the Kernel:stable:Backport:standard
repository (sound works fine after installing this kernel, latest Alsa libs AND
sof-firmware).

Unfortunately, VirtualBox runs not fine at all. I installed the KMP (in the
same version) from Kernel:stable:Backport:KMP:standard and VirtualBox starts
without complaining about missing modules (and I see vboxnetadp, vboxnetflt and
vboxdrv in the output of lsmod).

But when I try to run a virtual machine, the sidebar shows only a progress bar
"VM hochfahren ..." , stuck at 20%. Additionally I get much output in the
kernel log (see attached file). I have the same problem with different virtual
machines (Windows 11, openSUSE).

When booting the host system with the openSUSE Leap 15.5 stock kernel
(currently 5.14.21), VirtualBox VMs run fine.