another debugging thing to try...
I think that maybe the vif interfaces are missing or having trouble coming up
Try putting the following in your /etc/network/interfaces
auto br0 iface br0 inet static address 192.168.133.7 netmask 255.255.255.0 broadcast 192.168.133.0 bridge_ports eth0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off
Then run: /etc/init.d/networking restart
Then in the guest try changing the vif line to add
vif=['bridge=br0']
Then try to start the guest.
another debugging thing to try...
I think that maybe the vif interfaces are missing or having trouble coming up
Try putting the following in your /etc/network/ interfaces
auto br0
iface br0 inet static
address 192.168.133.7
netmask 255.255.255.0
broadcast 192.168.133.0
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
Then run: d/networking restart
/etc/init.
Then in the guest try changing the vif line to add
vif=['bridge=br0']
Then try to start the guest.