When booted into Windows, both WiFi and ethernet connect
When booted into Ubuntu MATE, WiFi connects but ethernet will not.
I am not very experienced in linux CLI and seek guidance from those versed in linux and networking.
If someone is kind enough to assist this old guy, it will be much appreciated. Please let me know what information I might provide. The relevant commands will be very helpful.
Welcome to our forums. To start with, can you please provide us with the output of for the following commands while the WiFi is disconnected:
Show current IP address: $ ip a
List hardware: $ lspci
Configuration files: $ ls /etc/netplan/ $ cat /etc/netplan/01-network-manager-all.yaml $ cat /etc/netplan/01-netcfg.yaml
-Device: (contains correct MAC address of Realtek adapter)
-Cloned MAC address: (is blank)
-MTU: automatic
-Wake on LAN: Default is checked
-Wake on LAN password: (is blank)
-Link Negotiation: Ignore is selected
-Speed: 100Mb/s (but is greyed out)
-Duplex: Full (but is greyed out)
The following with WiFi disabled, but computer not restarted. (MAC addresses neutered)
“ip a
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
valid_lft forever preferred_lft forever
2: enp3s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
link/ether 12:34:56:78:99:87 brd ff:ff:ff:ff:ff:ff
3: wlx00212f30a0d9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 12:34:56:78:99:87 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.236/24 brd 192.168.1.255 scope global dynamic noprefixroute wlx00212f30a0d9
valid_lft 85189sec preferred_lft 85189sec
inet6 12:34:56:78:99:87/64 scope global temporary dynamic
valid_lft 3594sec preferred_lft 3594sec
inet6 12:34:56:78:99:87/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 3594sec preferred_lft 3594sec
inet6 12:34:56:78:99:87/64 scope link noprefixroute
valid_lft forever preferred_lft forever”
Please try again with the enp3s0 device name as returned from previous command. What we are looking for here is that after you execute the last ip a command your network interface enp3s0 should have receive a new IP address from dhcp. Please try:
$ ip a
$ sudo systemctl stop network-manager
$ sudo dhclient enp3s0
$ ip a
I had this issue 2 days ago and resolved it by doing the following via the GUI.
Right click on your network icon and select ‘Edit connections’.
Under Ethernet highlight ‘Ethernet connection1’ then click on the ‘Delete’ button. Confirm by clicking on ‘Delete’ button.
Click on the ‘Add’ button and ensure ‘Ethernet’ is selected. Click on the ‘Create’ button. Click on ‘Save’.
You may need to restart.
This should solve your Ethernet not working but Wi-Fi ok issue.
Kind regards 3os.