gh0st I need your help trying something if you still have the Whonix archives at hand. Extract a new pristine image and before you import it change the storage attributes to what I’ll post here. I don’t have pristine non-booted images of Whonix and downloading will take time. Then import and see if it boots. Reason is I’m trying to get virtio-blk working for a faster harddisk.
http://wiki.libvirt.org/page/Virtio#Disk_.28block.29_device_driver
Note, this step is only needed in order to transition a guest from IDE or SCSI to virtio. If you initially install the guest using a virtio disk, or if you update the kernel package while booted from a virtio disk, then this step is not needed.
<disk type='file' device='disk'>
<driver type='qcow2'/>
<source file='/var/lib/libvirt/images/Whonix-Custom-Workstation.qcow2'/>
<target dev='vda' bus='virtio'/>
</disk>
This means that changing to virtio from IDE becomes a hassle requiring changes to the guest. I want to see if starting out with virtio instead means that we never have to go through this.
This gives me the idea that