Can someone help me i have bought new wireless usb adapter and it is not working on my manjaro kde plasma desktop. Below is output of lsusb
~ lsusb 1 ✘
Bus 001 Device 006: ID 22d9:276a OPPO Electronics Corp. SDM778G-IDP _SN:8F7AD3F2
Bus 001 Device 004: ID 0bda:f179 Realtek Semiconductor Corp. RTL8188FTV 802.11b/g/n 1T1R 2.4G WLAN Adapter
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 413c:301a Dell Computer Corp. Dell MS116 Optical Mouse
Bus 002 Device 002: ID 1a2c:6004 China Resource Semico Co., Ltd USB Keyboard
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
below is output of ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 00:e0:4c:41:51:b0 brd ff:ff:ff:ff:ff:ff
altname enp2s0
3: enp0s29f7u6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 1000
link/ether aa:04:a6:39:8f:64 brd ff:ff:ff:ff:ff:ff
inet 192.168.156.128/24 brd 192.168.156.255 scope global dynamic noprefixroute enp0s29f7u6
valid_lft 2278sec preferred_lft 2278sec
inet6 fe80::6afc:9b0a:486:7645/64 scope link noprefixroute
valid_lft forever preferred_lft forever
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proper driver for your wifi is: rtl8188fu and not the rtl8188gu … so uninstall it, install kernel headers if you didnt, and install the proper driver: pamac build 8188fu-supremegamers-dkms-git
(this is the latest version)
reboot
~ lsusb -vt INT ✘
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
ID 1d6b:0001 Linux Foundation 1.1 root hub
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
ID 1d6b:0001 Linux Foundation 1.1 root hub
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
ID 1d6b:0001 Linux Foundation 1.1 root hub
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
ID 1d6b:0001 Linux Foundation 1.1 root hub
|__ Port 1: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
ID 1a2c:6004 China Resource Semico Co., Ltd
|__ Port 1: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
ID 1a2c:6004 China Resource Semico Co., Ltd
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
ID 413c:301a Dell Computer Corp. Dell MS116 Optical Mouse
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/8p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 3: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 480M
ID 0bda:f179 Realtek Semiconductor Corp. RTL8188FTV 802.11b/g/n 1T1R 2.4G WLAN Adapter
|__ Port 6: Dev 8, If 0, Class=Wireless, Driver=rndis_host, 480M
ID 22d9:276a OPPO Electronics Corp.
|__ Port 6: Dev 8, If 1, Class=CDC Data, Driver=rndis_host, 480M
ID 22d9:276a OPPO Electronics Corp.
Looks like the device has 2 modes. You need to switch to wifi mode. Not sure here, but you need to set it with the terminal command usb_modeswitch somehow.
The Realtek RTL8188FTV-VB-CG is an 802.11b/g/n 2.4G single-chip that integrates Wireless LAN (WLAN) and a network USB interface (USB 1.0/1.1/2.0 compatible) controller Oops!
still not resolved. I don’t know how to switch to wifi mode. Also in system settings i cannot see wifi setting and under connections section i am just seeing wired connection1 which is my mobile connected to pc via usb tethering. do i need to setup wifi here ?
It’s been two days i am not able to troubleshoot this issue
So try installing version 5.15, as @megavolt suggested:
mhwd-kernel --install linux515
If you already have it installed, and it’s still not working in said kernel, uninstall all drivers you installed, make sure it’s not blacklisted, and reboot to test.
However, you are in excellent hands with @megavolt there, so continue following his advice before attempting mine.
Tip: 
