Comment 10 for bug 1273276

Another update: I continue to update my main VM every day, and this issue persists, but now Unity shell on that same VM does not work, and hasn't since 2014.02.17 ( bug 1284536 and bug 1282342 ).

Now my other GNOME only type VM's don't work all. They just give a black screen and/or terminate.
I did a fresh install from the daily 64 bit GNOME ISO of today (2014.02.26) and it doesn't work at all.
I can make it work by switching from the vmvga driver to the cirrus driver, but the cirrus driver has other issues.

I used this command to create the VM:

sudo virt-install -n desk_gnome_tt -r 8192 --disk path=/media/newhd/desk_gnome_tt.img,bus=virtio,size=50 -c trusty-gnome-20140226-amd64.iso --network bridge=br0,model=virtio,mac=52:54:00:a6:7a:8f --video=vmvga --graphics vnc,listen=0.0.0.0 --noautoconsole -v --vcpus=4