ERROR Couldn't find hvm kernel for Ubuntu tree.

安装python-virtinst

git clone https://github.com/palli/python-virtinst.git
cd  python-virtinst
python setup.py install

修改OSDistro.py，改变__init__方法里的else：条件下面的一行，将"i386"改为"amd64"即可

vi  /usr/lib/python2.7/site-packages/virtinst/OSDistro.py

- self._treeArch = 'i386'
+ self._treeArch = 'amd64'