kubuntu 18.04 no wifi on network manager but in terminal is detected

WTFFFFF! NO WIFI ON KDE NETWORK MANAGER APPLET but with iwlist is detected  (07:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01) so the driver was working properly infact i connect to a open wifi , without password. so WHY!!! i guess for a problem with some systemd conf files anyway….



 systemctl --type service

which has this silly answer :

systemd-networkd-wait-online.service loaded failed failed Wait for Network to be Configured

checking even the wpa_supplicant service with

systemctl status wpa_supplicant.service
Failed to initialize control interface '/run/wpa_supplicant'.
 You may have another wpa_supplicant process already running or the file was
 left by an unclean termination of wpa_supplicant in which case you will need
 to manually remove this file before starting wpa_supplicant again.
sudo systemctl status NetworkManager.service

i got even this shit

 error>   sup-iface[0x56547f32d5b0,wlp7s0]: error adding interface: wpa_supplicant couldn't grab this interface.

now how to fix it !?

sudo systemctl  stop NetworkManager.service
sudo systemctl  stop wpa_supplicant.service 
sudo systemctl  start wpa_supplicant.service 
sudo pkill wpa_supplicant 
sudo systemctl  start wpa_supplicant.service
sleep 4
sudo systemctl start NetworkManager.service


result 😀



  1. CHECK IF YOUR CARD IS ENABLE ON BIOS , if you want to see that just do  on therminal rfkill list  and make sure it’s all NO
  2. ENABLE YOUR CARD  sudo ifconfig XXXX up ( your card name that should be wlp7s0 you can get the name from ifconfig alone without optios) as you can see here

    sudo rfkill unblock all
    0 wlan phy0 unblocked unblocked
    1 bluetooth hci0 unblocked unblocked
    sem@semvaio18:~$ ifconfig
    lo: flags=73 mtu 65536
    inet netmask
    inet6 ::1 prefixlen 128 scopeid 0x10
    loop txqueuelen 1000 (Local Loopback)
    RX packets 31198 bytes 1590503 (1.5 MB)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 31198 bytes 1590503 (1.5 MB)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
    wlp7s0: flags=4163 mtu 1500
    inet netmask broadcast
    inet6 fe80::1e7f:5239:d350:a751 prefixlen 64 scopeid 0x20 ether a4:19:32:c1:1c:23 txqueuelen 1000 (Ethernet)
    RX packets 4184 bytes 2798289 (2.7 MB)
    RX errors 0 dropped 0 overruns 0 frame 0
    TX packets 4560 bytes 1447049 (1.4 MB)
    TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

  3. try to see if wpa supplicant is installed : sudo apt-get install wpasupplicant
  4. if you can’t see the network applet on your panel well maybe the network manager service is not started so start it and enable it with : sudo systemctl enable NetworkManager.service ; sudo
    systemctl start NetworkManager.service
  5. check the systemd-networkd-wait-online.service with systemctl status systemd-networkd-wait-online.service actuyally it gives me error even when i am connect so i guess it’s not so important like i thought but he has given me a hint to fix this shit so ..
  6. another command useful to get errors it’s this
    journalctl -xe

from here https://forums.linuxmint.com/viewtopic.php?t=171819
this is for my own use interfaces

auto wlp7s0
iface wlp7s0 inet dhcp
wireless-power off

sudo kate /etc/default/crda


set dns kde kubuntu

If you have a crap new ultra speed modem like me ,  and you want set DNS but you can not set them on the modem you can handle the situation in this way

just on network manager , click on the wrench or just go in the settings , locate ipv4 and on Other Dns Server put this : THESE ARE THE GOOGLE DNS … OR CHOOSE WHAT YOU NEED …,

here the picture

if you want test … just do this

nm-tool | grep DNS

USB network sharing kde kubuntu plasma 5 android

sharing connection on kubuntu with android using USB :


go in the settings of android ==> More ==>tethering personal hotspot






simple and it works very good.