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    #1

    [Internet] Update disabled wifi

    I just installed the security update this morning, and upon rebooting, my wireless network is down. I don't seem to have the option of enabling it. I tried following some of the topics with similar issue with no luck. Some of them require an internet connection, which is kind of pointless in my case.

    I have no option to connect and no easy way to connect through using Ethernet either. I am kind of hooped here.

    Ifconfig apparently is not installed.

    Iwconfig results in:

    Code:
    enp3s  no wireless extensions

lo          no wireless extensions
    Sudo lshw -C network

    Shows the controller details. There's no practical way to transfer that output here.
    Tags: None
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    #2
    You've given exactly no information about anything that would be needed to help you.

    Please Read Me
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      #3
      What do you need? Bear in mind I have to type it on the phone screen for now. There is no Ethernet connection to this machine.
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        #4
        Start with the version of Kubuntu, hardware details like model of PC or wifi card or both, review the log file at /var/log/apt/history.log and list any files that might relate to wifi or networking, the output of "rfkill list" - those would be a good start.

        ifconfig is a program included in the net-tools package. If it's not actually there (as opposed to maybe you typed it in wrong) you might have discovered the issue. Make sure you typed it correctly (i.e. no caps).

        Please Read Me
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          #5
          Originally posted by oshunluvr View Post
          Start with the version of Kubuntu, hardware details like model of PC or wifi card or both, review the log file at /var/log/apt/history.log and list any files that might relate to wifi or networking, the output of "rfkill list" - those would be a good start.

          ifconfig is a program included in the net-tools package. If it's not actually there (as opposed to maybe you typed it in wrong) you might have discovered the issue. Make sure you typed it correctly (i.e. no caps).
          Kubuntu version 17.04

          It's just a budget custom PC I bought on Amazon. No brand.

          Wireless is a USB controllee: Realtek RTL8111/8168/8411

          lshw displays the controller just fine

          The log file shows Linux headers from the security update that did this. There are some python updates. I don't see anything relating to wireless.

          I noticed the network manager application is not installed. Was that not supposed to be default installed and could the update have removed it?

          ifconfig is *not* installed either. It prompts me to install it, but at this point, it's obviously not possible.

          Everything worked fine until I rebooted after the security update.

          I have no option to enable or disable wifi either.
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            #6
            Well, sounds like (obviously) something went south during the update. NM should be installed by default and is generally needed for wifi control. If net-tools is not installed, that seems like damage too.

            Do you have a liveUSB or DVD you can boot too? That should least allow internet access.

            The problem is, without any internet connection to the PC, there's no way to replace anything that's broken. Frankly, without knowing what is broken beyond net-tools, downloading and installing random packages until you hit the correct one could be a lot of work and take a lot of hours.

            At this point if it were me - I'd boot to your original install media and re-install. If you want to prevent this from occurring again, when you re-install use btrfs file system instead of ext4. Then, before upgrading, you can take a snapshot of your entire installation. If it breaks, you simply have to boot to the snapshot and try again.

            Please Read Me
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              #7
              Oh wait. Hold on. I can still tether the phone. I am back online with the computer temporarily through the phone. I am going to try to reinstall ifconfig.
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                #8
                Still no luck. I don't think it even sees the adapter.
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                  #9
                  The package would be net-tools.

                  sudo apt install --reinstall net-tools

                  Please Read Me
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                    #10
                    ifconfig output?

                    Please Read Me
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                      #11
                      Code:
                      enp0s19f2u1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
     inet 192.168.42.95  netmask 255.255.255.0  broadcast 192.168.42.255
     inet6 fe80::ccb3:34aa:2129:207c  prefixlen 64  scopeid 0x20<link>
     ether aa:a1:c8:27:19:87  txqueuelen 1000  (Ethernet)
     RX packets 66  bytes 16041 (16.0 KB)
     RX errors 5  dropped 0  overruns 0  frame 5
     TX packets 130  bytes 34143 (34.1 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp3s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
     ether 1c:1b:0d:3b:28:aa  txqueuelen 1000  (Ethernet)
     RX packets 0  bytes 0 (0.0 B)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 0  bytes 0 (0.0 B)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
     inet 127.0.0.1  netmask 255.0.0.0
     inet6 ::1  prefixlen 128  scopeid 0x10<host>
     loop  txqueuelen 1000  (Local Loopback)
     RX packets 1012  bytes 74296 (74.2 KB)
     RX errors 0  dropped 0  overruns 0  frame 0
     TX packets 1012  bytes 74296 (74.2 KB)
     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
                      Something killed ethernet and wireless altogether? Shouldn't there be something like eth0 and wlan0?

                      Code:
                      daniel@daniel-GA-78LMT-USB3-6-0:~$ ifconfig wlan0 up
wlan0: ERROR while getting interface flags: No such device
                      Last edited by CruceSignati; Sep 18, 2017, 02:59 PM.
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                        #12
                        No, they stopped using generic names like eth0 3 years ago. wlan0 is not used either.

                        enp3s0 is probably your ethernet port.

                        If you're using a USB device for wifi, there's a whole 'nother bunch of stuff to consider - the USB part. I rarely use wifi and never a usb dongle. I'm hoping someone will jump in who does, but start with the output of lsusb so we can at least see what device you're using and try iwconfig again.

                        BTW, realtec drivers maybe the in a different paackage you havent installed yet like r8168-dkms

                        Please Read Me
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                          #13
                          sounds like a bunch of essential stuff got removed ,,,,,,,,

                          run this and post it ,,,in code tags ... the # button at the top of the text input Field hear

                          Code:
                          cat /var/log/apt/term.log | grep -i "Removing"
                          VINNY
                          Last edited by vinnywright; Sep 18, 2017, 06:18 PM.
                          i7 4core HT 8MB L3 2.9GHz
                          16GB RAM
                          Nvidia GTX 860M 4GB RAM 1152 cuda cores
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                            #14
                            It doesn't even see the adapter at all.
                            Code:
                            daniel@daniel-GA-78LMT-USB3-6-0:~$ lsusb
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 013: ID 04e8:6863 Samsung Electronics Co., Ltd GT-I9500 [Galaxy S4] / GT-I9250 [Galaxy Nexus] (network tethering)
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 002: ID 046d:c31c Logitech, Inc. Keyboard K120
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 009 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 008 Device 003: ID 0458:0186 KYE Systems Corp. (Mouse Systems) 
Bus 008 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
                            As far as the drivers.. when I installed, the default drivers were terrible, causing the connection to drop intermittently. I installed the drivers from Realtek and it was fine.
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                              #15
                              Originally posted by vinnywright View Post
                              sounds like a bunch of essential stuff got removed ,,,,,,,,

                              run this and post it ,,,in code tags ... the # button at the top of the text input Field hear

                              Code:
                              cat /var/log/apt/term.log | grep -i "Removing"
                              VINNY
                              Code:
                              daniel@daniel-GA-78LMT-USB3-6-0:~$ cat /var/log/apt/term.log | grep -i "Removing"
daniel@daniel-GA-78LMT-USB3-6-0:~$
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