How can I get the band (2.4 / 5 GHz) selection back in wifi settings? (ubuntu 20.04)

Question

I upgraded Ubuntu to 20.04 and the setting for preferred WiFi frequency has disappeared. You can see a screenshot of the drop-down menu here:

How can I get this drop down menu back?

References

• How to set wifi driver settings to prefer 5 GHz channel above 2.4 GHz

Answer 1

The dropdown menu was removed from the UI (I could not find the reason).

But there is a work-around, by checking the manual of nm-settings:

• Locate the targeted WiFi connection profile in /etc/NetworkManager/system-connections/nameofconnection.nmconnection
• edit with sudo nano /etc/NetworkManager/system-connections/nameofconnection.nmconnection
• Under section [wifi] add following entry
  • for 2.4 GHz only band=bg
  • for 5 GHz only band=a
• save changes and connection should use the new configuration

Answer 2

Credits for @heynnema

To access the settings in a GUI execute nm-connection-editor in a terminal. Then choose your desired connection and click on edit.

Thanks. This did the trick for me!