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Description of problem: before install,in customize configuration window, change storage disk bus will pop-up error msg. Version-Release number of selected component (if applicable): virt-manager-0.9.0-5.el6 libvirt-0.9.4-1.el6 How reproducible: always Steps to Reproduce: 1.create a new virtual machine, create a disk image on hard drive in Step 4. 2.in Step 5 ,click "Customize configuration before install",then click finish 3.in new window,select a storage in left panel 4.in Advanced options,change Disk bus to "Virtio" or "IDE" 5.click "apply" button Actual results: a dialog pop-up with error msg. Details msg: Error changing VM configuration: 'NoneType' object has no attribute 'xpathEval' Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/details.py", line 2317, in _change_config_helper func(*args) File "/usr/share/virt-manager/virtManager/domain.py", line 574, in define_disk_bus return self._redefine_device(change, devobj) File "/usr/share/virt-manager/virtManager/domain.py", line 307, in _redefine_device return cb(dev) File "/usr/share/virt-manager/virtManager/domain.py", line 570, in change editdev.address.clear() File "/usr/lib/python2.6/site-packages/virtinst/VirtualDevice.py", line 173, in clear self._remove_child_xpath("./address") File "/usr/lib/python2.6/site-packages/virtinst/XMLBuilderDomain.py", line 458, in _remove_child_xpath _remove_xpath_node(self._xml_ctx, xpath, dofree=False) File "/usr/lib/python2.6/site-packages/virtinst/XMLBuilderDomain.py", line 186, in _remove_xpath_node node = _get_xpath_node(ctx, curxpath) File "/usr/lib/python2.6/site-packages/virtinst/XMLBuilderDomain.py", line 71, in _get_xpath_node node = ctx.xpathEval(xpath) AttributeError: 'NoneType' object has no attribute 'xpathEval' Expected results: can set disk bus w/o error Additional info: this issue not occur on virt-manager-0.8.6-4.el6,so it's a regression bug.
Actually a virtinst bug, fixed upstream: http://git.fedorahosted.org/git?p=python-virtinst.git;a=commit;h=061668208fa6cd8f45cf66dd921a56386de3f3b5
Fixed in python-virtinst-0.600.0-3.el6
verify with: ibvirt-0.9.4-7.el6 qemu-kvm-0.12.1.2-2.184.el6 kernel-2.6.32-191.el6 virt-manager-0.9.0-6.el6 python-virtinst-0.600.0-3.el6 1.create a new virtual machine, create a disk image on hard drive in Step 4. 2.in Step 5 ,click "Customize configuration before install",then click finish 3.in new window,select a storage in left panel 4.in Advanced options,change Disk bus to "Virtio" or "IDE" 5.click "apply" button the Disk bus can be set without error. the bug fixed. verification passed.
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Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2011-1643.html