Github user wido commented on the issue: https://github.com/apache/cloudstack/pull/1545 @jburwell The old systemVM will also work, but that assumes it's serial port is *always* the first port attached. The XML we generate will make sure that the Qemu Guest Agent port is the second one, so the old SSVM template will still work. I run this patch in production with 4.9 without a modified SSVM, works fine. The changes in the SSVM are just there to make it more robust against such changes.
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