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Ethenet problem with 24.04.1

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    #1

    [RESOLVED] Ethenet problem with 24.04.1

    I have been using kubuntu for about 3weeks on this device now but suddenly the ethernet stopped working but the wlan still works fine.
    Specs that maybe usefull:
    - msi b660-a pro motherboard
    - No name wifi stick

    Software that I use that may cause this issue:
    - vm ware 17 with self signed drivers
    - nvidia drivers
    - the x11 version of kde

    other Stuff that may help:

    ip a:

    Code:
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether d8:bb:c1:d2:ed:cd brd ff:ff:ff:ff:ff:ff
3: wlxd0c0bf2185ab: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether d0:c0:bf:21:85:ab brd ff:ff:ff:ff:ff:ff
inet 192.168.188.42/24 brd 192.168.188.255 scope global dynamic noprefixroute wlxd0c0bf2185ab
valid_lft 863142sec preferred_lft 863142sec
inet6 2003:f6:f709:fc00:50e1:9830:38a4:7b82/64 scope global temporary dynamic
valid_lft 6884sec preferred_lft 1449sec
inet6 2003:f6:f709:fc00:39ad:769d:1f0e:5899/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 6884sec preferred_lft 1449sec
inet6 fe80::78ef:25f1:de80:6fd5/64 scope link noprefixroute
valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:cd:c5:77 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
5: lxcbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 00:16:3e:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.0.3.1/24 brd 10.0.3.255 scope global lxcbr0
valid_lft forever preferred_lft forever
    sudo lshw -C network:

    Code:
    *-network
description: Ethernet interface
product: RTL8125 2.5GbE Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 05
serial: d8:bb:c1:d2:ed:cd
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=6.8.0-44-generic duplex=full firmware=rtl8125b-2_0.0.2 07/13/20 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:16 ioport:3000(size=256) memory:81100000-8110ffff memory:81110000-81113fff
*-network
description: Wireless interface
physical id: 7
bus info: usb@1:10
logical name: wlxd0c0bf2185ab
serial: d0:c0:bf:21:85:ab
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtw_8822bu driverversion=6.8.0-44-generic firmware=N/A ip=192.168.188.42 link=yes multicast=yes wireless=IEEE 802.11
    sudo cat /etc/netplan/01-network-manager-all.yaml:

    Code:
    network:
version: 2
renderer: NetworkManager
​
    ​A screenshot of the network connections in the settings:
    https://imgur.com/a/BLIRps4



    I have search online but found no solution
    Last edited by claydoh; Sep 12, 2024, 07:32 AM. Reason: removed text formatting bbcode. I can swear we didn't need to worry about this way way back in the day, lol.
    Tags: kde, network
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    #2
    Have you tried creating a new wired connection? You don't have one.
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      #3
      yes i tried it but without success:
      this pops up every 3seconds now:
      https://imgur.com/a/a7ag5Gi

      and here are the settings of the new connection:
      https://imgur.com/a/lWGqUts (i just used the default ones)

      What could have happened that it doesn't work in all of a sudden? I mean there was an connection before and i didn't delete one....
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        #4
        No idea what broke, but the second image shows your wifi connection,. not the wired one. The defaults *should* be fine, normally -- automatic DHCP. You might try disabling ipv6 if you are not using it.
        You have done basic steps, such as checking the cable, even swapping it out if possible? Checked your router's settings, and even switched the cable to a different port?

        The popup seems to indicate that it is trying to connect, but can't
        nmcli device disconnect enp3s0 && nmcli device connect enp3s0 <--sub wgatever device name you have. This is from your command line output in your first post.
        There is a small possibility that you need to disconnect from wifi in order tom use a wired connection. - I have seen some systems where the BIOS has such settings, though usually these are laptops with Ethernet..

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          #5
          Turns out it was the cabel and the missing wiered connection! Tanks for your time and help
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            #6
            Originally posted by NewBe View Post
            Turns out it was the cabel and the missing wiered connection! Tanks for your time and help
            another idea is to check eithernet cable its one of the things we all can overlookyou can look at router where cable plugs in and look at lights on system where it plugs in and is something wrong faster than following the cable
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