New upgrade from 16.04 to 18.04. The 16.04 is a new DVD install too. After install, decided to upgrade to 18.04. Quad core ASUS + AMD tower computer. 8GB RAM. Newer 1TB HDD.
Downloaded the 8812au drivers yesterday using my RaLink wifi adapter which worked fine as soon as plugged into a USB port, installed it, connected the Realtek USB adapter (RT) and it worked all day. Even worked in tandem with the RaLink adapter. Downloaded and installed my favorite apps and programs. Everything went well.
Then late in the day installed KiCAD CAD software, V4. Discovered an issue and upgraded to V5. Went to bed with it still downloading.
This morning, discovered that the RT wifi adapter wasn’t shown and wasn’t connected. Checked Network Connections and it showed that it had been connected 11 minutes prior. Rebooted. Network manager still did not show the adapter.
Reinstalled the drivers…that went well no errors. Still not shown in Network manager. Rebooted. Still not shown.
Moved the adapter over to my Win7 machine. Hardware discovered, drivers installed, got online. Moved adapter back to Ubuntu machine, not discovered. Tried different USB ports, not discovered. Plugged the RaLink adapter into the same USB port, online in seconds.
dkms status rtl8812au, 4.3.14, 4.15.0-52-generic, x86_64: installed (WARNING! Diff between built and installed module!) rtl8812au, 126.96.36.19975.20140902+dfsg, 4.15.0-51-generic, x86_64: installed rtl8812au, 188.8.131.5275.20140902+dfsg, 4.15.0-52-generic, x86_64: built