Error while attempting to create a virtual machine with virt-manager

[scott]

Possibly related:

https://old.reddit.com/r/archlinux/comments/ovcqmm/libvirtd_virtmanager_cannot_create_new_virtual/

KVM/QEMU cgroup.controllers - No such file or directory

Hello everyone, suddenly, from one day to another, I cannot start any VM using KVM. I can prepare the VM (RAM, diskspace, network etc...), but as soon I try to start the VM, a prompt appears with the following message: Installation konnte nicht fertiggestellt werden: «Kann nicht von '/sys/fs/cgroup/machine.slice/machine-qemu\x2d1\x2dslackware14.2.scope/libvirt/cgroup.controllers' lesen: Datei oder Verzeichnis nicht gefunden» What I already tried out: I restart libvirtd and make shure it r…