I recently purchased a new TP-Link AC600 Archer T2E Wireless Dual Band PCIe Adapter for a new build. I have tested this card in 2 machines running Ubuntu 20.04, but I've gotten the same result. I couldn't even get the light on the bracket of the card to signal, leading me to think it was defective. To be sure, I put the card in yet a different machine running Windows 10, and it worked without hesitation.
lspci
appears to recognize the card as "Network controller: Realtek Semiconductor Co., Ltd. Device b821" which is incorrect. I am currently on kernel 5.15.0-60-generic.
~$ lspci -knn | grep Net -A3 00:19.0 Ethernet controller [0200]: Intel Corporation 82567LM-3 Gigabit Network Connection [8086:10de] (rev 02) Subsystem: Dell 82567LM-3 Gigabit Network Connection [1028:027f] Kernel driver in use: e1000e Kernel modules: e1000e 00:1a.0 USB controller [0c03]: Intel Corporation 82801JD/DO (ICH10 Family) USB UHCI Controller #4 [8086:3a67] (rev 02) -- 01:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:b821] Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:b821]
lspci -knn | grep Net -A3
terminal command. AS TEXT PLEASE, not as a screenshot.