Problem on Ubuntu "no Wi-Fi adapter found" how to enable it

Question

Hello, I installed Ubuntu in dual boot with Windows 10 on my PC. Here is my problem: The Wi-Fi works perfectly on Windows but on Ubuntu I get this message "no Wi-Fi adapter found". I have looked at many forums and here is what I understood: I may be missing the Wi-Fi driver. Apparently, I should use a USB stick because I can't connect via Ethernet cable as my PC doesn't have an Ethernet port. Sorry, I'm a beginner on Linux. If it helps you, here is some information: - My PC = Lenovo IdeaPad S145 - When I type "lsusb" in the terminal, here is what I get:  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 004: ID 1a2c:4094 China Resource Semico Co., Ltd USB Keyboard Bus 001 Device 003: ID 174f:1176 Syntek Integrated Camera Bus 001 Device 005: ID 0bda:c02f Realtek Semiconductor Corp. Bluetooth Radio Bus 001 Device 002: ID 145f:01d9 Trust USB Optical Mouse Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub lucas@lucas-Lenovo-IdeaPad-S145  - When I type "lspci -nn | grep -i network" I get: Realtek semiconductor Here it is, I don't know where the problem might come from, I hope to get some feedback. Thank you in advance.

zipe31 · Answer

Hi,  The exact command to type is: lspci -nnk | grep -i -A3 'network'  Here’s what it returns for me: $ lspci -nnk | grep -i -A3 'network'03:00.0 Network controller [0280]: Qualcomm Atheros AR9462 Wireless Network Adapter [168c:0034] (rev 01) Subsystem: Lite-On Communications Inc AR9462 Wireless Network Adapter [11ad:0802] Kernel driver in use: ath9k Kernel modules: ath9k  -- _______________________________ ☯ Zen my nuggets ☮ _____________________________ Do something for the environment, close your windows and adopt a penguin… ????

Tartiflette · Answer

Hello,  To test: https://askubuntu.com/questions/1208729/lenovo-s145-wi-fi-drivers

jns55 · Answer

Hello, Can you provide the result of the command rfkill list typed in the terminal?

Lucas · Answer

Hi, thank you for your quick responses. I typed this command: lspci -nnk | grep -i -A3 'network' and I obtained: 01:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:c82f]  Subsystem: Lenovo Device [17aa:c02f] 06:00.0 Non-Volatile memory controller [0108]: Sandisk Corp Device [15b7:5005] (rev 01)  Subsystem: Sandisk Corp Device [15b7:5005] Thank you Tartiflette for the link, I will check it out and Jns55 I just saw your message, I will do that right away.

Lucas · Answer

With this command: rfkill list I received:  0: hci0: Bluetooth  Soft blocked: yes  Hard blocked: no 1: ideapad_wlan: Wireless LAN  Soft blocked: no  Hard blocked: no 2: ideapad_bluetooth: Bluetooth  Soft blocked: yes  Hard blocked: no

Lucas · Answer

Here is where I stand: I connected with my phone using tethering and it connected, it shows "wired connected" and on my phone the "tethering" badge. The problem is, I don't have time to type the commands because it disconnects by itself after about 5 seconds. I tried with another USB port and it worked perfectly. I then typed the command to install Github as in this tutorial. https://askubuntu.com/questions/1216699/wifi-adapter-not-found-in-ubuntu-18-04-no-drivers-for-device-rtl8822ce/1228462#1228462  But when I type the command: sudo apt update I get:  Err:1 http://fr.archive.ubuntu.com/ubuntu focal InRelease  Temporary error resolving "fr.archive.ubuntu.com" Err:2 http://security.ubuntu.com/ubuntu focal-security InRelease  Temporary error resolving "security.ubuntu.com" Err:3 http://fr.archive.ubuntu.com/ubuntu focal-updates InRelease  Temporary error resolving "fr.archive.ubuntu.com" Err:4 http://fr.archive.ubuntu.com/ubuntu focal-backports InRelease  Temporary error resolving "fr.archive.ubuntu.com" Reading package lists... Done Building dependency tree Reading state information... Done All packages are up to date. W: Unable to retrieve http://fr.archive.ubuntu.com/ubuntu/dists/focal/InRelease Temporary error resolving "fr.archive.ubuntu.com" W: Unable to retrieve http://fr.archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease Temporary error resolving "fr.archive.ubuntu.com" W: Unable to retrieve http://fr.archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease Temporary error resolving "fr.archive.ubuntu.com" W: Unable to retrieve http://security.ubuntu.com/ubuntu/dists/focal-security/InRelease Temporary error resolving "security.ubuntu.com" W: Downloading some index files failed, they have been ignored, or old ones have been used instead.  Also, when I type: sudo apt install -y dkms git I get:  Reading package lists... Done Building dependency tree Reading state information... Done No version of the package dkms is available, but it exists in the database. This generally means that the package is missing, has become obsolete, or is available only from another source.  E: The package "dkms" does not have a candidate version to install E: The package "git" does not have a candidate version to install  There you go, does anyone have an idea of the problem? Because I need to install github for the next steps in the tutorial.

jns55 · Answer

The problem is that you need an internet connection to install the driver and apparently there is no ethernet port on this PC... Am I mistaken?

Lucas · Answer

Exactly, there aren't any. But isn't there another solution with another computer, a USB key, or my phone?

Lucas · Answer

Too bad then, and I guess it will be the same for each distribution? I can therefore uninstall Ubuntu. I've just realized that my touchpad mouse isn't working. Do I also need to download another driver? But is there no solution with a USB stick? I found this but I don't know if it’s good: https://debian-facile.org/viewtopic.php?id=25745

Lucas · Answer

No, I misspoke. I mean to install the driver for my WiFi card on a USB flash drive, on Windows (because I am in dual-boot) and then go back to Ubuntu and plug in my USB to install the driver.

brupala · Answer

Hello, the first thing to do when buying your first notebook: invest in a gigabit/usb3 adapter, it always comes in handy sooner or later, especially (especially?) with Windows. it’s 20 euros that will save a lot of time.   -- and ... There you go!

Problem on Ubuntu "no Wi-Fi adapter found" how to enable it

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