Alfa AWUS036ACU

[Majdoddin]

this device seems to have Chipset Realtek RTL8812BU, not mt7921aun

source: https://alfa-network.eu/awus036acu

[morrownr]

Hi @Majdoddin

this device seems to have Chipset Realtek RTL8812BU

I have one. Yes, it has a rtl8812bu chipset.

What is your source that says it has a mt7921au chipset?

[Majdoddin]

sorry, I was confused.
I bought this device this weak and it has chipset RTL88x2bu (same series as RTL8812BU?). This can be checked from ALFA (check Linux Hardware).
Not a big issue, because this chip uses the same in-kernel driver as rtl8812bu: check here and here.

I should mention that the in-kernel driver is available from kernel >=6.2, meaning current Debian stable (kernel 6.1) does not have it. I had to backport-upgrade my kernel to get it run.

[morrownr]

Debian 12 has kernel 6.6 LTS available. That is what I use. It works well.

rtw88 does not yet support USB3 for the rtl8812bu so speed is limited but it is fast enough to not be a problem for most people. Hopefully that can be fixed this year.