vm is not connected to the network

[Yuki0720]

The VM is not connected to the network.
I'm using ubuntu desktop (because I couldn't find the cause of the problem with ubuntuserver).
I don't think I have the right driver, but I can't install the driver because I only have wired LAN.
(I am Japanese)

 

[Dunuin]

The VM is not connected to the network.
...
I don't think I have the right driver, but I can't install the driver because I only have wired LAN.

Sounds like you attached a wifi interface to a bridge?
If yes, most wifi chipsets just won't allow you to be bridged. In such a case your host can use the wifi interface but no VMs/LXC connected to that bridge will be able to access the network (or the internet).
A workaround would be a routed network setup where you got a isolated bridge that isn't attached to any NIC or wifi interface and then your host needs to route between the wifi interface and the bridge. But thats a littel bit complicated. Here is an example of such a routet setup.

But in general you want to avoid using wifi if you run a server because it is unreliable.