Wifi Problem on Ubuntu 20.04 -

leyla

4/27/23, 9:36 AM

I have installed the Ubuntu 20.04 to my old laptop Lenovo G580.

Since then I could connect internet via ethernet but there is no sign or driver for Wifi. So, I tried a couple of solution, installing kernel etc. But there is still the problem.

The driver is Broadcom BCM43142 802.11b/g/n (rev 01)

Appreciate any help, I try every solution find in websites....

0 + 0

broadcom

drivers

leyla

4/27/23, 10:09 AM

unfortunately... it did not work. I tried again but there is no wifi.

leyla

4/27/23, 12:50 PM

Actually, I try to solve this problem almost for a week by today including reinstalling ubuntu again and again. So when i saw a solution I can remember whether I tried or not... But thanks for the explanation.

Score:0

Ubuntu

Yuri Sucupira

4/27/23, 10:15 AM

Open a shell terminal window (you may press Ctrl Alt T or right-click a free area of your Desktop and then select Open Terminal, among other ways to do it) and then run the commands below.

Install the Linux firmware support package and also the Broadcom support packages for your device (the two broadcom-* packages below add support for BCM43142):
```
sudo apt install linux-firmware broadcom-sta-common broadcom-sta-dkms -y --reinstall
```
Unload conflicting Broadcom modules (i.e. kernel device drivers for other/conflicting Broadcom devices):
```
modprobe -r b44 b43 b43legacy ssb brcmsmac
```
Load the wifi module for your Broadcom device:
```
sudo modprobe wl
```
Reboot:
```
reboot
```

PS: if step #2 fails, try running step #3 before step #2 (i.e. first load the wl module and only then attempt to unload the conflicting modules). If step #3 fails aswell or for any reason your wifi still doesn't work, disable Secure Boot and then try the above steps again.

0 + 0

leyla

4/27/23, 12:55 PM

after second step there is an error message: 'modprobe: ERROR: ../libkmod/libkmod-module.c:799 kmod_module_remove_module() could not remove 'b43': Operation not permitted modprobe: FATAL: Module ssb is in use.' is that normal?

Yuri Sucupira

4/27/23, 1:01 PM

@leyla In such case, execute step #1, ignore (don't execute) step #2 and then execute steps #3 and #4. If your wifi works, the modules aren't conflicting. If however the modules conflict and you therefore can't use wifi, you likely need to disabe Secure Boot and then execute the 4 steps above again, because Secure Boot is likely preventing unloading the conflicting module. Check [this answer](https://askubuntu.com/a/1198351/389062).

leyla

4/27/23, 1:09 PM

I disabled the secure boot and repeated all steps then it worked! thank you so much!

Yuri Sucupira

4/27/23, 1:11 PM

@leyla Awesome. You're welcome. Glad to help. :)

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Wifi Problem on Ubuntu 20.04 -

TH: ปัญหา Wifi บน Ubuntu 20.04 -

RO: Problemă Wifi pe Ubuntu 20.04 -

RU: Проблема с Wi-Fi в Ubuntu 20.04 —

VI: Sự cố Wifi trên Ubuntu 20.04 -

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