UGREEN 90339 AC650 USB WiFi Adapter Driver

Linux Installation notes for Kernel 4.4.x to 5.x  (Advanced Linux Technician required)

Internal photos on the FCC report shows what appears to be a RTL8811CU chip used during the radiation testing, this also is the chip that is used in the final production so we know that this is the chip used. The Linux driver for this device as provided by UGREEN seems have difficulties. The driver states that it is for the RTL8821CU chip which is ok as there seems to be some similarity, but there are issues with it.

What is needed is the driver that is located here at github

From a technical standpoint we can't supply a compiled driver because it needs to be compiled to your computers CPU architecture. If you can't access github the driver is below. Also the compile instructions are below.