http://www.mail-archive.com/libvir-list@xxxxxxxxxx/msg16154.html
and that was solved, comes back in a different way.
Consider a working kvm machine with the following description:
...
<os>
<type arch='x86_64' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
...
If I delete "machine='pc'" attribute from <type>, so description becomes
...
<os>
<type arch='x86_64'>hvm</type>
<boot dev='hd'/>
</os>
...
then libvirt chooses a machine='pc-0.11' value (again: qemu API version
instead of kvm version) and I get
virsh # start DD
error: Failed to start domain DD
error: internal error unable to start guest: Supported machines are:
pc Standard PC (default)
isapc ISA-only PC
---
This problem actually occurs when using virt-manager, see
https://www.redhat.com/archives/virt-tools-list/2009-October/msg00037.html
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