IT/Hardware/USB-WiFi

Drivers

In order to determine what driver you need, you must first find out what USB-Wifi adapter you are using. To do so use

lsusb

You may need to dig deeper

to list all USB devices connected to your computer and look for the WiFi adapter.

sudo lshw -C network

These two pages give great information.

Chipsets

Kernel Drivers

PowerSave

Sometimes the wireless NIC will drop ever so many minutes. This is likely a powersave issue.

/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

Change the powersave value to 2

Save the file and restart the computer.

If you don't believe me run iwconfig and the "Power Management:on" flag will still be there. You can restart NetworkManager

sudo systemctl restart NetworkManager

Run iwconfig and taadaa still "on" Just restart the computer.

Has limited success on 8812cu chipset

Another option which may likely work better is to use tlp

Install tlp from the repositories

systemctl enable tlp.service

sudo nano /etc/tlp.conf

Change these lines so that both are "off" and then save:

1. WiFi power saving mode: on=enable, off=disable; not supported by all adapters.
2. WIFI_PWR_ON_AC=off
3. WIFI_PWR_ON_BAT=on

sudo tlp start

Check the status here:

tlp-stat --rfkill

Here are lots of usage examples

RTLwifi PPA

To install a driver from this repository, download the repository using the following command:

sudo add-apt-repository ppa:kelebek333/kablosuz

Then open Synaptic Package Manager, search for rtl and mark the driver you need for installation and apply changes.

Original Source:

RTW8821

This is a variant of the RTL It worked well natively till the 6.5 kernel when it broke again.

git clone https://github.com/morrownr/8821cu-20210916.git

cd 8821cu-20210916

sudo ./install-driver.sh

It will open a dialog where you can edit more options.

Reboot to finish

Original Source: