Ubuntu 20.04 looses WiFi adaptor

I just did a fresh install of Ubuntu 20.04 on an old computer and after 1-2H of usage the WiFi drops and there is no way to connect it back since the prefs show an error message: No wifi adaptor found. (Works again after a reboot).

FYI: The wifi card is an Atheros AR9485 (internal) and is running using ath9k & everything is up-to-date

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Author: Skïp

Cannot connect to Wi-Fi network although my Realtek WiFi adapter is detected

I am facing a weird problem in Ubuntu 20.04 with kernel version 5.4.0-40. I have got a Wi-Fi adapter from Realtek for connecting my PC to the internet. From this answer, I have followed the instructions and downloaded and installed the driver from Github. It worked well for a few months, but since a few days I am facing the issue.

Ubuntu is detecting the presence of a Wi-Fi adapter, but whenever I am going to WiFi settings to connect to a network, the settings page says No WiFi adapter found:
enter image description here
I can understand that Ubuntu is detecting the adapter because WiFi option is appearing in the system tray when I connect the adapter:
enter image description here

I have also tried connecting to WiFi network from the command line with iwconfig. Here is the output of the command:
enter image description here
When I try to connect to a WiFi network with the iwconfig wlx00e0202c7613 essid <SSID> key <PASSWORD> command, I am getting this error:
enter image description here

What is the problem and how to fix this issue? I do not know much about networking in Linux, so please ask if more information is required.

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Author: Puspam

Help please – installed ubuntu 18.04 lts – cant get ethernet/wifi working

I have a dell optiplex 9010 desktop PC. I have just installed ubuntu 18.04, alongside windows 10, on my hard disc in a separate partition. All is ok except I cannot establish an internet connection.
When I go onto settings> Wi-fi…..it says no wifi adapter found. I have tried running an ethernet cable from laptop to desktop but it will not establish a connection. I then tried tethering my mobile phone and this allowed me to go online however I still cant figure out how to install the drivers!!

Using my laptop (packard bell) I have looked online for the drivers for these devices only because I am assuming the device drivers are not present, I downloaded from an intel web site what I think are the related drivers. The name on the file to be extracted was e1000e-3.8.4.tar.gz.
I have extracted these files to a usb stick but have no idea if 1) This is the probable fix and 2) if it is how can I upload these drivers to my desktop. (my desktop is an optiplex 9010)

I am very new to linux and following some suggestions online I used the terminal command ‘lspci’ and this showed the following what I believe to be wifi/ethernet related devices on the system:

  1. ethernet controller [0200]:intel corp 82579LM gigabit network connection.
    Subsystem: Dell 82579LM gigabit network connection.
    Kernel driver in use: e1000e.
    Kernel modules: e1000e
  2. ethernet controller [0200]:intel corp 82572EI gigabit ethernet controller. Subsystem: intel corp PRO/1000PT server adapter [8086:1082]
    Kernel driver in use: e1000e.
    Kernel modules: e1000e

I have two ethernet cards in my desktop.

  1. Intel PRO/1000PT server adapter 82572EI and…
  2. Intel 82579LM gigabit network connection…

Any help would be very much appreciated. Thanks in advance.

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Author: zatta303

Not able to connect to Wireless network in Ubuntu 20.04

I am using Asus TUF FX505DT with the Wireless interface Realtek RTL8822BE 802.11a/b/g/n/ac WiFi adapter.
It sometimes stops displaying the available Wireless networks and sometimes it displays the available networks but I am not able to connect to any network and it keeps on asking for the Wifi password again and again or keep trying to connect to the network.

$ sudo iwconfig
wlp4s0    IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short  long limit:16   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:on
$ lspci 
04:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8822BE 802.11a/b/g/n/ac WiFi adapter (rev ff)
$ sudo lshw -C network
 *-generic
       description: Wireless interface
       product: RTL8822BE 802.11a/b/g/n/ac WiFi adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:04:00.0
       logical name: wlp4s0
       version: ff
       serial: dc:f5:05:b1:8f:81
       width: 32 bits
       clock: 66MHz
       capabilities: bus_master vga_palette cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtw_pci driverversion=5.4.0-37-generic firmware=N/A latency=255 link=no maxlatency=255 mingnt=255 multicast=yes wireless=IEEE 802.11
       resources: irq:69 ioport:d000(size=256) memory:f7700000-f770ffff

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Author: Somil Singla

Wifi get disconnected in ubuntu 20.4 lts

I recently installed ubuntu 20.4 on my laptop. Tjis is the first time I am using a linux distribution. After installing i am facing wifi discontinution problem. My wifi get disconnected almost immediately after connecting it. I tried every solution I found in internet. My wifi interface is wlp3s0

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Author: Abrar Raem

Install driver rtl8814au on ubuntu 20.04

Install driver rtl8814au on ubuntu 20.04

Based on this

Install driver rtl8814au on ubuntu 18.04

I installed manually (make && make install) the driver when I had the kernel

$ uname -r
5.4.0-26-generic

Now, ubuntu 20.04 wants to install the new one:

linux-image-5.4.0-29-generic

I did it before (upgrade the system then, the kernel) and the driver stopped to work, even I installed thousand times, was impossible to up the driver which logical name is “wlx50c4ddcf488e”.

The installation I made:

$ sudo apt install build-essential
$ sudo apt install bc
$ sudo apt install linux-headers-`uname -r`
$ sudo apt install git

$ git clone https://github.com/aircrack-ng/rtl8812au.git

$ cd rtl8812au
$ make && sudo make install

Does anyone has idea about what can I do? Now, I cannot upgrade my system without losing the wireless connection.

Thank a lot.

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Author: Ibringpies