I just bought my Deco M9 Plus and old Router is netgear RTN66W Double Band.
When I ran Ubuntu 20.04 with RTN66W, it can access the 2.4GHz band and Lenovo Z500 only supports 2.4GHz.
After I switch to M9, the Ubuntu no longer can access the wifi network.
Here is my setup:
Main network: 2.4 GHz + 5 GHz
Guess network: 2.4 GHz
The ubuntu cannot access both Main and Guess network. If I remove the wifi access password, then the Ubuntu can access the wifi without problems.
Also, my phones and other computers have no issues to access the wifi network and the system always prompts that the password is not correct.
If I run window 8 64 bit on this Z500 machine, it also has no issues to access the Main network.
Question> what might be the culprit that causes the issues specific for Ubuntu?