My wifi card is not detected on Realtek Semiconductor Co., Ltd. Device a85a Ubuntu 20.04.3. I have tried all kinds of different threads that have a similar problem and nothing has worked. I get the following message:

0000:02:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device a85a

A teacher told me he thinks the "blob" is missing but I don't know what that means.

Here are some commands I have tried:

sudo modprobe rtw89pci
modprobe: FATAL: Module rtw89pci not found in directory /lib/modules/5.11.0-43-generic***

Is there something I can do to solve it? I've been trying to solve this problem for 2 months now and I'm a bit desperate.



lspci -nnk | grep 0280 -A3
0000:02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:a85a]
    DeviceName: WLAN
    Subsystem: Hewlett-Packard Company Device [103c:88e2]
10000:e0:1d.0 PCI bridge [0604]: Intel Corporation Device [8086:a0b0] (rev 20)

sudo lshw -class network
  *-network UNCLAIMED       
       description: Network controller
       product: Realtek Semiconductor Co., Ltd.
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress cap_list
       configuration: latency=0
       resources: ioport:3000(size=256) memory:52000000-520fff

I'm getting this by following the thread that @chili555 suggested:

changed everything to documents folder and I'm getting an error

  • 1
    "sudo dkms install rts_pstor" What exactly is rts_pstor? Please edit your question and show the result of the terminal command: lspci -nnk | grep 0280 -A3 Welcome to Ask Ubuntu.
    – chili555
    Jan 24, 2022 at 21:23
  • And "Realtek RTS522A" is a card reader. And #2 install Broadcom drivers??? Jan 24, 2022 at 21:27
  • Please confirm that it is your wireless card that you are trying to get working. I will then edit your question to streamline it to remove non-essential data.
    – chili555
    Jan 24, 2022 at 21:36
  • I think it's called the wireless card. When I start the system there are no wifi networks I can connect to. The network symbol does not even appear unless I connect by cable.
    – Ama
    Jan 24, 2022 at 22:05
  • The problem is that the computer came with windows installed, and it seems the wifi drivers are not compatible with linux
    – Ama
    Jan 24, 2022 at 22:06

1 Answer 1


First of all, the correct driver for your device is indeed rtw89pci. Let's start from the beginning. With a working internet connection by ethernet, tethering or whatever means possible, open a terminal and do:

sudo apt update
sudo apt install git build-essential bc

Next, follow this process exactly: How to get Realtek RTL8852AE WiFi card to work on my new laptop

If applicable, you will have to disable Secure Boot.

Reboot and your wireless should now be working.

  • I edited the post uploading two pictures of what I'm getting when I follow the process you shared. Is it because I need to disable secure boot before doing that? Thank you for your help
    – Ama
    Jan 24, 2022 at 22:36
  • You are in the wrong directory! Your prompt says you are in the root directory /. Please do: cd ~ and try again. The ~ is on the upper left of my US keyboard. The root directory / is not writable by us mere mortal humans!
    – chili555
    Jan 24, 2022 at 22:42
  • hahaha true, changed it to the documents folder and I'm getting: modprobe: ERROR: could not insert 'rtw89pci': Operation not permitted
    – Ama
    Jan 24, 2022 at 22:55
  • sudo modprobe rtw89pci but first turn off Secure Boot.
    – chili555
    Jan 24, 2022 at 22:56
  • It is fixed!!!! Thank you soooo much
    – Ama
    Jan 24, 2022 at 23:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.