USB Wireless Adapter Not Recognized CInnamon 20.1

[metroidhunter768]

Hello,

i just recently installed LM Cinnamon and my USB wifi adapter is not being recognized. Driver manager tells me that no drivers are currently needed and network settings do not show any wireless options. This is running on a Dell Optiplex 7010 which does not have an integrated wireless card, only Ethernet. The system does recognize USB tethering through my cell phone, but I would much rather be able to use my wireless adapter as there are no Ethernet connections available to me at this time. I am quite new to Linux and especially Mint so all help would be appreciated. I will be glad to provide any necessary system information as needed.

Thanks!

[sleeper12]

We need to see more details, post results of:

Code: Select all

 inxi -Fxxxrz && rfkill list && lsusb && iwconfig && mokutil --sb-state 

[metroidhunter768]

Entering that produces the following:

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System:
  Kernel: 5.4.0-74-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 
  Desktop: Cinnamon 4.8.6 wm: muffin 4.8.1 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal 
Machine:
  Type: Laptop System: Dell product: OptiPlex 7010 v: 01 serial: <filter> 
  Chassis: type: 16 serial: <filter> 
  Mobo: Dell model: 0MN1TX v: A02 serial: <filter> UEFI: Dell v: A16 
  date: 09/09/2013 
CPU:
  Topology: Quad Core model: Intel Core i5-3470S bits: 64 type: MCP 
  arch: Ivy Bridge rev: 9 L2 cache: 6144 KiB 
  flags: avx lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 23147 
  Speed: 1726 MHz min/max: 1600/3600 MHz Core speeds (MHz): 1: 2807 2: 2400 
  3: 2310 4: 1958 
Graphics:
  Device-1: Intel Xeon E3-1200 v2/3rd Gen Core processor Graphics 
  vendor: Dell driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:0152 
  Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa 
  resolution: 1280x1024~60Hz 
  OpenGL: renderer: Mesa DRI Intel HD Graphics 2500 (IVB GT1) 
  v: 4.2 Mesa 20.2.6 compat-v: 3.0 direct render: Yes 
Audio:
  Device-1: Intel 7 Series/C216 Family High Definition Audio vendor: Dell 
  driver: snd_hda_intel v: kernel bus ID: 00:1b.0 chip ID: 8086:1e20 
  Sound Server: ALSA v: k5.4.0-74-generic 
Network:
  Device-1: Intel 82579LM Gigabit Network vendor: Dell driver: e1000e 
  v: 3.2.6-k port: f080 bus ID: 00:19.0 chip ID: 8086:1502 
  IF: eno1 state: down mac: <filter> 
  Device-2: Realtek USB3.0 802.11ac 1200M Adapter type: USB 
  driver: usb-network bus ID: 3-3:3 chip ID: 0bda:b812 serial: <filter> 
  IF-ID-1: usb0 state: unknown speed: N/A duplex: N/A mac: <filter> 
Drives:
  Local Storage: total: 149.06 GiB used: 19.82 GiB (13.3%) 
  ID-1: /dev/sda vendor: LITE-ON IT model: LCS-128M6S 2.5 7mm 128GB 
  size: 119.24 GiB speed: 6.0 Gb/s serial: <filter> rev: 10E scheme: GPT 
  ID-2: /dev/sdb type: USB vendor: SanDisk model: Cruzer Glide 
  size: 29.82 GiB serial: <filter> rev: 1.26 scheme: MBR 
Partition:
  ID-1: / size: 116.38 GiB used: 18.38 GiB (15.8%) fs: ext4 dev: /dev/sda2 
Sensors:
  System Temperatures: cpu: 31.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com ulyssa main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
Info:
  Processes: 231 Uptime: 3d 49m Memory: 7.66 GiB used: 1.55 GiB (20.3%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 9 Shell: bash 
  v: 5.0.17 running in: gnome-terminal inxi: 3.0.38 
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0781:5575 SanDisk Corp. Cruzer Glide
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 006: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory
Bus 003 Device 005: ID 046d:c402 Logitech, Inc. Marble Mouse (2-button)
Bus 003 Device 004: ID 0424:2514 Microchip Technology, Inc. (formerly SMSC) USB 2.0 Hub
Bus 003 Device 003: ID 0bda:b812 Realtek Semiconductor Corp. USB3.0 802.11ac 1200M Adapter
Bus 003 Device 015: ID 0489:c022 Foxconn / Hon Hai Nokia 6.1
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
eno1      no wireless extensions.

usb0      no wireless extensions.

lo        no wireless extensions.

SecureBoot enabled

[sleeper12]

You need to disable secure boot in Bios.

[sleeper12]

If it still isn't working after secure boot is disabled, try this one line at a time:

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sudo apt install git dkms
git clone https://github.com/cilynx/rtl88x2bu.git
sudo dkms add ./rtl88x2bu
sudo dkms install rtl88x2bu/5.6.1 

Reboot

[metroidhunter768]

That worked beautifully. Had to unplug and replug the adapter afterwards for it to kick in but now it recognizes wifi no problem. I appreciate you taking the time to help out a greemhorn like myself who clearly has zero idea what I am doing .

[sleeper12]

Oh, good. At least you knew enough to unplug & replug which I neglected to mention.