No wifi after upgrade to 18.04

[jpc2769]

None of those things makes any difference; I am connected with a wired connection, it is the only thing that works at the moment. It is connected to my router.

[claydoh]

Does it work if you turn off/disable the VPN (this is what tun0 is)
You look connected via a wired connection, what is it connected to?
Have you tried your laptop's function keys to try toggling the wifi on?

[jpc2769]

:~$ rfkill
ID TYPE      DEVICE                 SOFT      HARD
0 bluetooth tpacpi_bluetooth_sw blocked unblocked

and

:~$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
     inet 192.168.0.12  netmask 255.255.255.0  broadcast 192.168.0.255
     ether f0:de:f1:fd:7b:29  txqueuelen 1000  (Ethernet)
     RX packets 2324  bytes 2014725 (2.0 MB)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 1948  bytes 490103 (490.1 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
     device interrupt 20  memory 0xf2500000-f2520000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
     inet 127.0.0.1  netmask 255.0.0.0
     loop  txqueuelen 1000  (Local Loopback)
     RX packets 941  bytes 143665 (143.6 KB)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 941  bytes 143665 (143.6 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
     inet 10.22.10.6  netmask 255.255.255.255  destination 10.22.10.5
     unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 100  (UNSPEC)
     RX packets 1634  bytes 1620367 (1.6 MB)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 1386  bytes 244518 (244.5 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[GreyGeek]

What does "rfkill" show for your system? Mine shows this:

:~$ rfkill
ID TYPE      DEVICE              SOFT      HARD
 0 wlan      phy0           unblocked unblocked
 1 wlan      acer-wireless  unblocked unblocked
 2 bluetooth acer-bluetooth unblocked unblocked
 3 bluetooth hci0           unblocked unblocked

And, the output of "ifconfig"

EDIT: using nmcli you can turn your nm on or off in a Konsole
nmcli radio wifi on

Or, you can try the method given in this link
https://askubuntu.com/questions/1061...-inspiron-3542

to solve the problem i need to blacklist dell-rbtn (this is hardware issue) to balcklist dell-rbtn, i did
echo "blacklist dell-rbtn" | sudo tee /etc/modprobe.d/dell-rbtn.conf
and after this reboot the laptop and now i m able to use WIFI.

except that you will havve to change "dell-rbtn" to what ever you have.

[jpc2769]

Thanks, I did that, but it's still like I have no wifi at all. I have attached a picture of the network manager widget, there used to be a wifi icon next to the airplane, now it is gone; and no wifi connections show up, although I can see (but not connect to) all the old ones if I open network manager settings…

[GreyGeek]

I was unable to make a network connection when I first installed Kubuntu 18.04. What worked for me was:
Right click on the wifi icon in the system tray. Choose "Network Settings" Uncheck the checkbox "Ask for PIN on modem detection".

[jpc2769]

Hello all,

Yesterday I upgraded to 18.04, since then I have had no wifi.

I am running a Thinkpad X230T, the hardware is an Intel 82579LM Gigabit Network Connection, it appears to be connected and up, and as far as I can tell the drivers are installed.

Initially, in the network manager widget, there was an icon for wifi, it was on, I could see the networks, but not connect. I opened network manager settings, there was no stored password for my home network. I tried to enter the password, when I clicked "OK" it disappeared, and I could not get it to "stick", nor connect to the network at all.

I did some google searching, and found this page, so I followed the directions there:

https://askubuntu.com/questions/1038...8-04-and-16-04

Now, the network manager widget does not show the wifi icon at all, nor any of the wireless networks.

I am at a loss, how do I even diagnose the problem?