The 8188GU often requires a specific GitHub driver (like rtl8188gu ) as it may not be in the mainline kernel. Install build-essential and linux-headers .

Once the driver is installed, if you experience lag or dropouts, check these two settings:

This is the most crucial step. Because the 8188GU is sold by hundreds of different brands (TP-Link, Tenda, Fenvi, generic unbranded), the official Realtek website is often difficult to navigate for end-users.