I tried these solutions yesterday. After trying these solutions, my problem was not solved. Still not working. Rather I had a problem. My system stopped shutting down. I could not solve this problem and I had to re-install my whole system.
I have bought a Tenda W311MI USB WiFi adapter. This is not working in my 5.12.8 Kernel. lsusb command shows "Realtek Semiconductor Corp. RTL8188GU 802.11n WLAN Adapter (Driver CDROM Mode)". Many people have the same issue. Is there any working solution?