Github user rhtyd commented on the issue: https://github.com/apache/cloudstack/pull/1696 @ustcweizhou Hi, I think I used your changes here. VMware is sane to interpret Ubuntu guest vms as either ubuntuGuest or ubuntu64Guest (identifier used), while to XS and KVM full names are passed while may or may not exist. XenServer 6.5 and KVM/LXC may not understand/interpret Ubuntu 16.04 correctly so, the workaround here is to tell the hypervisor(s) to treat VMs of this guest os id/type to be a Ubuntu 14.04.
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