Ubuntu stopped working with the last Windows PRO updates

[ILya BWR]

After update to the latest updates of Windows PRO (Version 20H2, 19042.867),
Ubuntu 20.04 cannot start via VirtualBox (6.1.18).
Reproduced on two different PCs.

Stack on the *** VALIDATE cgroup2 *** line all the time.

virtualbox_stack.PNG (18.53 KiB) Viewed 882 times

[scottgus1]

Please right-click the guest in the main Virtualbox window's guest list, choose Show Log.

Search the far left tab's log for this text:

Attempting fall back to NEM

If you find it, Hyper-V is enabled. See HMR3Init: Attempting fall back to NEM (Hyper-V is active).

If you don't find that text, save the far left tab's log, zip the log file, and post the zip file, using the forum's Upload Attachment tab.

[ILya BWR]

Indeed, Hyper-V is the problem.
But WSL2 uses it to run Docker Desktop, how to run both?

Thanks scottgus1

[scottgus1]

how to run both?

For now it will be 'either/or', not both. See the tenforums link in the tutorial for a boot-time switch.