Description of problem:
virt guest: restart/shutdown/allocate mem or cpu doesn't work

Version-Release number of selected component (if applicable):
Satellite-5.4.0-RHEL5-re20100924.0

How reproducible:
always

Steps to Reproduce:
1. sat540 and connect a kvm host
2. create kvm guest through provisioning
3. try some of the feature: stop, start, reboot, allocate mem, allocate cpu
  
Actual results:
# rhn_check -vv
D: check_action {'action': "<?xml version='1.0'?>\n<methodCall>\n<methodName>virt.shutdown</methodName>\n<params>\n<param>\n<value><string>7bf6273dc8857992775edb71b8ce5b43</string></value>\n</param>\n</params>\n</methodCall>\n", 'version': 2, 'id': 85}
updateLoginInfo() login info
D: login(forceUpdate=True) invoked
logging into up2date server
D: writeCachedLogin() invoked
D: Wrote pickled loginInfo at  1285759859.63  with expiration of  1285763459.63  seconds.
successfully retrieved authentication token from up2date server
D: logininfo: {'X-RHN-Server-Id': 1000010022, 'X-RHN-Auth-Server-Time': '1285759893.02', 'X-RHN-Auth': 'RZRiYp4DalBMoyRkzLzXkg==', 'X-RHN-Auth-Channels': [['rhel-x86_64-server-5', '20100926053655', '1', '1'], ['rhn-tools-rhel-x86_64-server-5', '20100926053655', '0', '1'], ['rhel-x86_64-server-vt-5', '20100926053655', '0', '1']], 'X-RHN-Auth-User-Id': '', 'X-RHN-Auth-Expire-Offset': '3600.0'}
D: handle_action {'action': "<?xml version='1.0'?>\n<methodCall>\n<methodName>virt.shutdown</methodName>\n<params>\n<param>\n<value><string>7bf6273dc8857992775edb71b8ce5b43</string></value>\n</param>\n</params>\n</methodCall>\n", 'version': 2, 'id': 85}
D: handle_action actionid = 85, version = 2
D: do_call virt.shutdown ('7bf6273dc8857992775edb71b8ce5b43',)
libvir: QEMU error : operation failed: shutdown operation failed
D: Sending back response ((6,), 'Fatal error in Python code occured', {})
D: do_call packages.checkNeedUpdate ('rhnsd=1',)
Loaded plugins: rhnplugin
D: local action status:  (0, 'rpm database not modified since last update (or package list recently updated)', {})


Expected results:
I can schedule all the virt-guest actions

Additional info: