Problem finding WIFI with USB adapter

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1

I just bought a USB adapter with both Bluetooth and WiFi. The Bluetooth works fine. Could easily connect to Bluetooth devices. But not the WiFi. Anyone got any idea what I could try?

2

Hi @Bonjati!

Well, this isn’t really KDE related, you’re probably missing some firmware package fron your distro.

You could try a few commands to see if your adapter shows up, from a konsole window:

lsusb
/sbin/ip link show

lsusb should display several USB devices, you should see your adapter as it is detected as Bluetooth, I don’t know if it’d show up as a different device for Wifi.

The ip command should show your networking devices, I guess the wifi should show up as wlan0 or similar.

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3

That command give the following answer

Bus 002 Device 002: ID 0bc2:2320 Seagate RSS LLC USB 3.0 bridge [Portable Expansion Drive]
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 008: ID 2109:8888 VIA Labs, Inc. USB Billboard Device   
Bus 001 Device 011: ID 0bda:4040 Realtek Semiconductor Corp. USB Audio
Bus 001 Device 010: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 Gigabit Ethernet Adapter
Bus 001 Device 009: ID 05e3:0751 Genesys Logic, Inc. microSD Card Reader
Bus 001 Device 007: ID 1a40:0801 Terminus Technology Inc. USB 2.0 Hub
Bus 001 Device 006: ID 0c45:636b Microdia CameraA
Bus 001 Device 005: ID 093a:2521 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 003: ID 2109:2817 VIA Labs, Inc. USB2.0 Hub             
Bus 001 Device 002: ID 0bda:c820 Realtek Semiconductor Corp. 802.11ac NIC
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
    link/ether 48:4d:7e:e3:15:a5 brd ff:ff:ff:ff:ff:ff
3: enp0s20f0u7u4u2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:e0:4c:fa:02:3f brd ff:ff:ff:ff:ff:ff

I can´t see anything that looks like WIFI or Bluetooth.

4

Could this be the device?

BROADCAST,MULTICAST,UP,LOWER_UP

5

No, if you search about the USB ID, you can find the

‘Realtek Semiconductor 802.11ac NIC’

It will be supported by kernel 6.2 which ate today only available at rolling release distros like openSUSE Tumbleweed or new Fedora 38.

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6

Yep, that’s the wifi (802.11ac) adapter.

7

So basically I’m screwed? Cant get it to work atm on kubuntu no matter what I try?
But Manjaro is rolling release right? So that should work?

8

You could try to install a new kernel under Kubuntu using a PPA.

Older kernels don’t get removed so you can always go back if the new kernel doesn’t work for you.

I found this howto which might be useful to you: