Wifi usb adapter

[Amtab]

Good evening
I premise that I am a neophyte and I have installed on my laptop Hp dv6 Kubuntu 22.10.
The internal wifi card works only at 2.4 Ghz and I would like to use the adapter in question to take advantage of the 5 Ghz band as well.
I installed the drivers following some guides on the net and giving the command "dkms status" from terminal I get:
bcmwl/6.30.223.271+bdcom, 5.19.0-21-generic, x86_64: installed
bcmwl/6.30.223.271+bdcom, 5.19.0-31-generic, x86_64: installed
rtl8821cu/5.12.0.4, 5.19.0-31-generic, x86_64: installed

Everything seems fine but I can't find the adapter anywhere to make the change.
Could you please help me?
Thank you

[Amtab]

The adapter is : Realtek Semiconductor Corp. 802.11ac NIC
P.s. excuse me for the bad English

[claydoh]

We need to see more info about the USB adapter.

lsusb will show it.

The ID numbers and info will be useful to make sure that you are trying to use the correct driver.
Which specific instructions are you following? They could be old, outdated, or just wrong.

[Amtab]

Bus 002 Device 004: ID 064e:a127 Suyin Corp. HP Integrated Webcam 
Bus 002 Device 003: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technolog
y Corp. JMS578 SATA 6Gb/s
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 046d:c077 Logitech, Inc. Mouse
Bus 001 Device 004: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4
USB 2.0 Hub
Bus 001 Device 003: ID 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[claydoh]

I installed the drivers following some guides on the net

So, which specific thing did you follow?

Bus 001 Device 003: ID 0bda:c811 Realtek Semiconductor Corp. 802.11ac NIC

This matters as kernel change, drivers get old, and github forks stop being maintained, etc.
But rtl8821CU is the correct device

[Amtab]

The device doesn't work so I'd better buy another one

[Schwarzer Kater]

There is a good website with a list of supported USB-WIFI adapters - if you want to buy a new one that works ootb:
https://github.com/morrownr/USB-WiFi