[KVM] graphics initialization failed

# uname -a
Linux eva 2.6.38-8-server #42-Ubuntu SMP Mon Apr 11 03:49:04 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

...
<graphics type='vnc' port='5905' autoport='no' keymap='en-$
<video>
      <model type='vga' vram='9216' heads='1'/>
</video>
...