[SOLVED] No nested KVM after upgrade to 5.0

stacktrace

New Member
Sep 5, 2012
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Germany
proxmox.stacktrace.de
I had an issue after upgrading to 5.0 Beta. Nested virtualisation was not working anymore on AMD platform, which worked well on the same server wih 4.4. Qemu always said "No accelerator found" when I tried to start a VM under Proxmox-In-A-Proxmox.

It looks like the needed "svm" cpu flag is not delivered to the guest-Proxmox, although "host" was set as cpu type on the host-Proxmox.

I did not find out where the problem exactly is, but as a workaround it was solved after a few tests by adding the following line to <vmid>.conf on the host-Proxmox:

args: -cpu host,+svm

If someone should have the same Problems with intel, try adding vmx instead of svm.

Best regards

Dennis
 

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