WiFi adapter not found in Ubuntu 20.04
After 2 days of searching I found the solution.
In fact, if you install Ubuntu and windows 10, your windows system will block your wifi card.
To prevent this, you have to disable the fast boot mode on windows.
this is how : https://help.uaudio.com/hc/en-us/articles/213195423-How-To-Disable-Fast-Startup-in-Windows-10
I was having the same problem and rectified by doing the following:
- Go to software and updates
- Disabled the proprietary wireless lan driver
- Restart the pc
- Et voilà!