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Tough lessons

On an Ubuntu system that acts a s a hypervisor, the system claimed to not support virtualization after a an upgrade. Strange because this system has been a hypervisor for the last 2 years…

Apparantly someone installed the xen-hypervisor package. This adds a xen.cfg file to etc/grub.d/ which sidables kvm-qemu’s abillity to check for hardware accelleration. Aka the booted kernel lacks the proper flags. However when running kvm-ok, it acutally claims that the ‘ processor is not capable of virtualization… which is false.

The quick fix was to remove the xen packages and make sure the xen.cfg was deleted from /etc/grub.d  and then reboot the system.