Forget about the last screenshot, it is difficult to understand, because Ubuntu 14.04 is running in "full screen" mode in the Ubuntu 22.04 windows. Ubuntu added that QEMU/KVM label, I have no clue why. That screenshot has only been added to show the display settings.
My description is correct and "Ubuntu 21.10+Virtualbox 6.1.30" run on the bare metal a Ryzen 3 2200G! They are both running on bare metal, since vboxdrv.ko and other vbox modules run in the kernel. The highest level is always Ubuntu 14.04. The intermediate level runs different different configurations like: - Ubuntu Mate 22.04 runs virt-manager/kvm and this one is extremely slow. - Ubuntu Budgie 22.04 runs gnome-boxes/kvm and this one is OK. on this intermediate level I did not mention it, but I also run: - Ubuntu 22.04 runs Virtualbox 6.1.30 and this one is OK. To proof that it is regression I already added: - Ubuntu 21.10 + virt-manager/kvm and this one is OK too. I have no other GPUs, but I have a 2011 HP Elitebook 8460p with integrated graphics and exactly the same VMs. However it will be difficult/impossible to run nested VMs, since it only has 8GB of DDR3. I have switched off 3D acceleration in the bare metal Virtualbox, but that had no effect. I have the feeling that the Compiz and a change in the display stack of virt-manager/kvm do cause the issue, especially since it gets terrible during the animations of Compiz, but also without those animations it is bad. Normally I would move the nested virtualization one level down and install virt-manager/kvm on bare metal, but there I run Ubuntu 21.10 and that release does not have that problem. If you have ideas for other tests? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1953628 Title: Too high CPU load in qemu-system-x86 compared to Ubuntu 21.04/21.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1953628/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
