No wifi after reboot

No WI-FI adapter found after restarting

I have successfully installed ubuntu 18.04.3 LTS, and at the beginning i’ve successfully connected to my wireless network, but after restarting the wifi adapter was not found. I’ve connected to the internet through lan cable and installed successfully wifi drivers. After that the wifi was fully functional, but after restarting there was the same issue- no wifi adapter. It was really annoying to install wifi drivers on every restart, and if you can help me i will be very grateful. Network adapter is: Intel(R) Wireless-AC 9462 Thanks for helping.

Thanks for your respond, but restarting is causing the issue. After restart i have to reinstall driver for wifi.

3 Answers 3

I had the same problem, but the solution was really different. When you install OS on your computer, secure boot is on. This means that your OS is going to have less abilities including connecting to WiFi. — HOW TO TURN OFF SECURE BOOT? Go to BIOS system. For doing that, you will need to turn off a PC. Every computer developer has its own way to go to BIOS. For example, I have HP laptop. When I start it, I press esc button and get the menu, then press F10 and go to BIOS. So look for your way to get there. Then look through BIOS menu options until you will see «Secure boot» one. Change the value to «Disabled» and save the settings. Then start Ubuntu. That may work, I am not sure, but anyway, try it. Secure boot is default on so it can block your WiFi driver.

Not yet supported in linux kernel shipped with Ubuntu 18.04. You Need to install backport like this to support latest Intel wifi :

sudo apt update sudo apt install git build-essential git clone https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/backport-iwlwifi.git cd backport-iwlwifi/ make defconfig-iwlwifi-public sed -i 's/CPTCFG_IWLMVM_VENDOR_CMDS=y/# CPTCFG_IWLMVM_VENDOR_CMDS is not set/' .config make -j4 sudo make install sudo modprobe iwlwifi 

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Arch Linux

Hi I’m running into trouble after following the official Installation guide. I have completed the Installation so far and done the first reboot after umounting.
I have logged in as root and wanted to install gnome but before I checked my Internet connection pinging a Website, which failed.
As I also had Trouble connecting to the WiFi on install I tried what solved the issue then but did not work this time which was

$ ip link set dev wlp58s0 down $ wifi-menu

I read that using netctl and NetworkManager would clash but

and Nothing for netctl.
If i now try connecting via

it says connecting failed.

My system is the Dell XPS13(9360).

Last edited by scarface_ (2020-06-12 07:17:40)

#2 2020-06-10 07:46:03

Re: [SOLVED]No wifi after fresh install and reboot

Youtube videos are a recipe for fail, and are not supported here.

Registered Linux User #482438

#3 2020-06-10 08:27:18

Re: [SOLVED]No wifi after fresh install and reboot

Okay removed the Video from the post. Still I followed the official guide until the Point of umont and reboot.

#4 2020-06-10 08:38:09

Re: [SOLVED]No wifi after fresh install and reboot

Is there something interesting in journalctl or dmesg?

#5 2020-06-10 08:39:22

Mr.Elendig #archlinux@freenode channel op From: The intertubes Registered: 2004-11-07 Posts: 4,086

Re: [SOLVED]No wifi after fresh install and reboot

Kill off netctl, start the NetworkManager service and use nmcli or nmtui to connect. If there are any errors then tell us about them. Also tell us which wifi card you have, which driver you are using etc.

Evil #archlinux@libera.chat channel op and general support dude.
. files on github, Screenshots, Random pics and the rest

#6 2020-06-10 13:18:16

Re: [SOLVED]No wifi after fresh install and reboot

Hi I’m running into trouble after following the official Installation guide. I have completed the Installation so far and done the first reboot after umounting.
I have logged in as root and wanted to install gnome but before I checked my Internet connection pinging a Website, which failed.
As I also had Trouble connecting to the WiFi on install I tried what solved the issue then but did not work this time which was

$ ip link set dev wlp58s0 down $ wifi-menu

I read that using netctl and NetworkManager would clash but

and Nothing for netctl.
If i now try connecting via

it says connecting failed.

My system is the Dell XPS13(9360).

Cheers,
Martin

I will make two suggestions, use the 05/01 ISO when installing to avoid issues during the initial installation, it will help avoid struggling to get wifi-menu working. Second, do the entire install including gnome and the apps you want and enable services and reboot into a working system, instead of wasting time doing additional procedures after the initial reboot

#7 2020-06-12 07:16:47

Re: [SOLVED]No wifi after fresh install and reboot

I will make two suggestions, use the 05/01 ISO when installing to avoid issues during the initial installation, it will help avoid struggling to get wifi-menu working. Second, do the entire install including gnome and the apps you want and enable services and reboot into a working system, instead of wasting time doing additional procedures after the initial reboot

Thank you, I will keep that in mind the next time I do an install.

What solved the problem for me this time was disabling wpa_supplicant. Then I could not uses nmcli beacause my wifi’s name is something like «fritz!box XXXX» and I got a bash error because of the !box part.
If somebody stumbles across this thread in the future:
The problem can be resolved using

which is a simple gui tool.

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WI-FI adapter is not detected after reboot unless it is replugged-in

I am USING Ubuntu 20.04 Fresh install and the only significant change I have made (except installing the drivers for the said adapter) is to disable «Wake on X» settings on BIOS since it caused the PC to reboot instead of shutting down. But even without this, 9 out of 10 cases, I do not see the wireless icon when I turn on the PC unless I take it out and plug it back in. Is there a solution to this, where I can keep it plugged in at the back of the case and not bother at all? Here is the Network manager log:

Mär 05 15:48:49 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955729.4703] agent-manager: agent[1a2f8924292a42c2,:1.80/org.gnome.Shell.NetworkAgent/1000]: agent registered Mär 05 15:49:34 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955774.7539] device (wlan0): driver supports Access Point (AP) mode Mär 05 15:49:34 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955774.7546] manager: (wlan0): new 802.11 Wi-Fi device (/org/freedesktop/NetworkManager/Devices/3) Mär 05 15:49:34 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955774.7605] supplicant: wpa_supplicant running Mär 05 15:49:34 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955774.7761] rfkill1: found Wi-Fi radio killswitch (at /sys/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1:1.2/ieee80211/phy0/rfkill> Mär 05 15:49:34 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955774.7834] device (wlan0): interface index 3 renamed iface from 'wlan0' to 'wlx1cbfce65cf9d' Mär 05 15:49:34 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955774.7896] device (wlx1cbfce65cf9d): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external') Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.4636] manager: (D4:0B:1A:E6:22:9C): new Bluetooth device (/org/freedesktop/NetworkManager/Devices/4) Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.4642] device (D4:0B:1A:E6:22:9C): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external') Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.4679] device (D4:0B:1A:E6:22:9C): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed') Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5155] sup-iface[0x5638a019a110,wlx1cbfce65cf9d]: supports 5 scan SSIDs Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5159] device (wlx1cbfce65cf9d): supplicant interface state: starting -> ready Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5160] Wi-Fi P2P device controlled by interface wlx1cbfce65cf9d created Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5162] manager: (p2p-dev-wlx1cbfce65cf9d): new 802.11 Wi-Fi P2P device (/org/freedesktop/NetworkManager/Devices/5) Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5165] device (p2p-dev-wlx1cbfce65cf9d): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'externa> Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5169] device (p2p-dev-wlx1cbfce65cf9d): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed> Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5171] device (wlx1cbfce65cf9d): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: > Mär 05 15:49:35 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955775.5234] sup-iface: failed to cancel p2p connect: P2P cancel failed Mär 05 15:49:39 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955779.4255] policy: auto-activating connection 'WLAN-07B646' (e1122307-80a2-41a8-b243-3cbd6bcbadab) Mär 05 15:49:39 ifrat-ThinkCentre-M83 NetworkManager[603]: [1614955779.4263] device (wlx1cbfce65cf9d): Activation: starting connection 'WLAN-07B646' (e1122307-80a2-41a8-b243-3cbd6bcbadab) 

In case it is relevant, these are the commands I have executed through terminal to get the dongle to be recognized by Ubuntu in the first place:

sudo apt update sudo apt install build-essential git dkms git clone https://github.com/brektrou/rtl8821CU.git cd rtl8821CU chmod +x dkms-install.sh sudo ./dkms-install.sh sudo modprobe 8821cu 

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