Re: [Qemu-discuss] Installed Ubuntu 14.04 and now getting "unknown OS type hvm" on my old VMs.

[Hans Deragon]

Greetings,

You put the finger on the problem.  In my xml, I got:

<os>
<type arch='x86_64' machine='pc-1.0'>hvm</type>
<boot dev='hd'/>
</os>

Now, how do I convert my VM to kvm?  Does the image itself needs to be 
converted or only the xml?

My VMs are used at home and it has been years since I did not have to 
play with them; I just let them run.  A testimony to the fabulous 
technology and stability behind KVM.  The drawback is that I am not 
aware of the changes brought to KVM nor what format are my images and 
how to manipulate them (it has been too long).  Pointers would be 
appreciated on how to go forward to convert them to the new version of 
KVM.

Best regards,
Hans Deragon

On 2014-10-06 08:42, Jakob Bohm wrote:
> On 06/10/2014 04:13, Hans Deragon wrote:
> > Greetings,
> >
> > I installed Ubuntu 14.04 64 bits and am now getting "unknown OS type
> > hvm" when I try 'virsh define <servername>' on my old VMs.
> >
> > A search trough the web suggest that kernel modules are not loaded.  I
> > my case, they are:
> >
> > # lsmod | fgrep kvm
> > kvm_intel             143109  0
> > kvm                   451511  1 kvm_intel
> Let me take a wild guess: your <servername>.xml file specifies the use
> of kvm in an oldway which is no longer supported by your new versions
> of libvirt and qemu.
>
> The phrase "hvm" (if that is how it is spelled in the XML) may refer
> to a XEN hvm setup, not a Linux kvm setup.
>
> --
>
> Enjoy
>
> Jakob