Wifi will not work on my friend's Latitude D630 after installing Ubuntu 20.04. I have updated the 20.04 to 20.04.6LTS.
I tried...https://askubuntu.com/questions/1233440/tplink-archer-t2u-ubuntu-20-04 at whose advice I ran...
sudo apt install git
git clone https://github.com/aircrack-ng/rtl8812au.git
... then I ran (admittedly out of order)...
sudo apt install git dkms
cd rtl8812au
sudo make dkms_install
I don't think the out-of-order was a problem. I got believable results to everything with no errors. However, per advice of bkakilli on May 2, 2021 I went ahead and also ran
sudo modprobe 88XXau
the path... Activities > Search > Wifi yields "No Wi-Fi Adaptor found" For the record, it connects to the internet using cable just fine. BIOS indicates that Wireless is Enabled. The D630 has a physical Wifi switch which is ON (after several back-and-forths) The D630 has 2GB of RAM whereas 4GB is recommended for 20.04. But similar answers I'm finding do not seem to see RAM as an issue.
Also I recently installed Ubuntu 22.04 on my Lenovo G570, admittedly a somewhat newer machine than the D630, but on the G570 Wifi works just fine showing me that my Wifi system is OK.
