I am running an Ubuntu 20.04 VM on a Windows 10 host. I would like to be able to go online in the VM while the host is offline. I have attached a USB WiFi adapter to the guest. The host is using a different WiFi adapter. But if I take the host offline, the guest goes offline too. What am I doing wrong?
Is the guest WiFi adapter turned on in the VM window and connected?
Have you tried disabling other network connections of the VM?
Guest WiFi adapter: Player > Removable Devices shows a checkmark next to the WiFi adapter, and an option to Disconnect

I don't know that the VM has any network connections other than the NAT or Bridged options I have tried in Settings

Sorry, I'm not sure I understand. I have tried connecting to the Internet, from inside the VM, with no WiFi adapters connected to the computer other than the one that is attached to the VM. Is that what you mean?
I'm confused. You said that you've attached (passed through) the USB stick to the VM. So why do you have an additional virtual network adapter configured?
The way your setup should work is to remove/disable the virtual NAT adapter in the VM's settings, and only use the passed through WiFi adapter with an in-guest driver

André
I did look for an option that said something like "None of the above" after the Bridged, NAT etc. options

I think you mean the "Connected" and "Connect at power on" boxes should not be checked. That makes sense to me. But if I uncheck them, there's no Internet access

I have two different USB WiFi dongles plugged into the host system. Either of them works for taking the host system online. Neither works for taking the VM online if the VM's "Connected" and "Connect at power on" boxes are unchecked

You probably need the internet access to get the drivers for the USB WiFi device into the VM. Once you get the USB WiFi drivers installed and up and running in the VM, you should be able to leave the "Connect at Power On" unchecked. It is hard to say how to test that it is working as usually two active NICs within a machine (physical or virtual) presents its own set of issues

You could also use the USB autoconnect strings in the vmx of the VM to make it automatically connect the USB WiFi dongle to the VM during powerup, aside from leaving the "Connect at Power On" for the NAT/Bridged NIC unchecked

httpskb.vmware.com/s/article/1648
It's a mystery. I've got the latest updates in the VM. But I can't get the WiFi adapters to make any difference. The only way Firefox in the VM can retrieve webpages is when I check the Connected box in Settings

I know this can work. I had a Win10 guest using one of these same adapters on the Win10 host. The host used one adapter; the VM used the other. Not sure whether the Ubuntu guest is the problem

You told earlier that
* "Guest WiFi adapter: Player > Removable Devices shows a checkmark next to the WiFi adapter Was this actually the Network Adapter with NAT/Bridge options?
For using the USB Wifi Dongle on the guest, it should show up as a separate removable device

I created a VM for a quick test and started Ubuntu 18.04 Live. Plugged a mobile network device into a USB port and Removable Devices menu shows
without any special settings needed. Tried 20.04 and worked as well

Is your USB WiFi dongle showing up as an additional removal device? Sometimes the problem could be different USB versions. Try changing the VM's USB ControllerUSB Compatibility


I don't know about using Microsoft Windows. At least not going online đŸ™‚
Mine (Windows host) looks a little different:
In this image, the TP-Link adapter is connected

If I choose Manage (or Ctrl-D) instead of Removable Devices, I get an option to go into Settings. There, I can choose NAT, Bridged, or other options. Those are independent of whether I connect TP-Link or any other device in the menu selection shown in this image. I assume those (i.e., NAT, Bridged, etc.) refer to the guest's connection to the host, not to these external USB devices

So I think we are talking about the same thing. It looks a little different in your Ubuntu example, but close enough

What I am saying, then, is that I can go online, in the VM, by going into Settings > check the Connect box > choose NAT or Bridged (or possibly one of the other options); but I cannot go online in the VM without checking the Connect box. This is true regardless of whether the TP-Link or Ralink WiFi adapter is connected at the menu pick shown above

(I assume the Network menu pick highlighted in that image refers to a virtual ethernet connection.)
Unfortunately, in Settings > USB Controller, setting USB Compatibility to USB 2.0 or 3.1 does not seem to make any difference

Menu item "Network Adapter" refers to the virtual ethernet connection, right. Now I made a bold move and removed it from the settings altogether

It does not show up in the guest window menu either. The USB Connected device "HMD Global still keeps me online

So, TP-Link is one of your USB Wifi adapters. It is connected to guest. Next (hopefully last) step would be to configure the Wifi connection inside the guest Ubuntu (not the Player settings). If it is password protected with WEP/WPA/WPA2

I'm running out of ideas. Fingers crossed.