Update, I tried adding root\virtualization\v2 to the namespace in libvirt source code for hyperv. I ran some tests and it seems to work. I get the same functionality (supported vs non-supported drivers) as hyper-v 2008. Do you guys want me to submit the patch? If yes, what all do I need to update to get the patch in? Thanks, Vik. On Tue, Apr 15, 2014 at 5:26 PM, vikhyath reddy <reddy.vikhyath(a)gmail.com&gt; wrote: > > Hello everyone, > > Thanks for libvirt. I did see on the libvirt page that hyper-v 2008 is > supported (which it does). So I tried running it on Hyper-v 2012 r2 but > virsh fails to connect by an error that says > > "error: internal error: SOAP fault during enumeration: code 's:Sender', > subcode 'n:CannotProcessFilter', reason 'The data source could not process > the filter. The filter might be missing or it might be invalid. Change the > filter and try the request again. ', detail '500The specified class does > not exist in the given namespace. HRESULT 0x8033801a0052150858778HRESULTThe > specified class does not exist in the given namespace. ' " > > Upon looking into the Hyper-v 2012 r2 server event logs, I found that this > is going on > > [ Source: WMI-Activity > Event ID: 5898 > Microsoft-Windows-WMI-Activity/Operational ] > > > Id = {62D480B2-58EF-0000-E580-D462EF58CF01}; ClientMachine = > VIKHYPERV; User = VIKHYPERV\Administrator; ClientProcessId = 884; > Component = Unknown; Operation = Start IWbemServices::ExecQuery - > root\virtualization : select * from Msvm_ComputerSystem where > Description = "Microsoft Hosting Computer System" ; ResultCode = > 0x80041010; PossibleCause = Unknown > > Note that Msvm_ComputerSystem is missing in the namespace > root\virtualization. Upon further investigation, I found that the new > namespace where Msvm_ComputerSystem is located is at root\virtualization\v2 > > Is (it possible?) there some way I can know where in the source code, > libvirt is specifying the namespace so that I can try patching it up and see > if it fixes things? > > Thanks for all your help, > Vik.