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see the link textfor troubleshooting . For help, i just copy and paste the required info.

Troubleshoot KVM

Trying to launch a new virtual machine instance fails with the ERRORstate, and the following error appears in the /var/log/nova/nova-compute.log file:

libvirtError: internal error no supported architecture for os type 'hvm'

This message indicates that the KVM kernel modules were not loaded.

If you cannot start VMs after installation without rebooting, the permissions might not be correct. This can happen if you load the KVM module before you install nova-compute. To check whether the group is set to kvm, run:

ls -l /dev/kvm

If it is not set to kvm, run:

udevadm trigger