I had two towers both running Solus Budgie 4, with updates within a few days of each other. One located in the garage and the other in our lounge room.
The garage tower had always used a WIFI connection. But the lounge always used the Ethernet connect cable.
The lounge tower motherboard failed, the USB ports were over powered according to a log that I read.
I removed the HDD and installed it in garage tower and moved the garage tower into the lounge room. It would not then connect by Ethernet as reported in my original post.
After the checks reported in earlier posts the problem had to be related to the Navigation window which I was opening from the panel. It was displaying Ethernet 1 and WIFI.
I was confusing WIFI and Ethernet settings. Once I understood what it was telling me, the problem was Solved.
The inxi -F report for the current lounge tower is below.
lounge@thelounge ~ $ inxi -F
System: Host: thelounge Kernel: 5.1.7-119.current x86_64 bits: 64 Desktop: Budgie 10.5 Distro: Solus 4.0
Machine: Type: Desktop System: Gigabyte product: N/A v: N/A serial: <root required>
Mobo: Gigabyte model: H77M-D3H serial: <root required> UEFI: American Megatrends v: F6 date: 05/11/2012
CPU: Topology: Quad Core model: Intel Core i5-3550 bits: 64 type: MCP L2 cache: 6144 KiB
Speed: 1597 MHz min/max: 1600/3700 MHz Core speeds (MHz): 1: 1596 2: 1596 3: 1596 4: 1596
Graphics: Device-1: NVIDIA G73 [GeForce 7300 GT] driver: nouveau v: kernel
Display: x11 server: X.Org 1.20.5 driver: nouveau unloaded: fbdev,modesetting,vesa resolution: 1680x105060Hz
OpenGL: renderer: NV4B v: 2.1 Mesa 19.0.6
Audio: Device-1: Intel 7 Series/C216 Family High Definition Audio driver: snd_hda_intel
Device-2: Logitech Webcam C930e type: USB driver: snd-usb-audio,uvcvideo
Sound Server: ALSA v: k5.1.7-119.current
Network: Device-1: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet driver: atl1c
IF: enp3s0 state: up speed: 100 Mbps duplex: full mac: REDACTED
Drives: Local Storage: total: 465.76 GiB used: 25.33 GiB (5.4%)
ID-1: /dev/sda vendor: Seagate model: ST3500630AS size: 465.76 GiB
Partition: ID-1: / size: 453.31 GiB used: 25.33 GiB (5.6%) fs: ext4 dev: /dev/dm-1
Sensors: System Temperatures: cpu: 29.8 C mobo: 27.8 C gpu: nouveau temp: 46 C
Fan Speeds (RPM): N/A
Info: Processes: 187 Uptime: 6h 24m Memory: 3.88 GiB used: 1.60 GiB (41.4%) Shell: bash inxi: 3.0.34
lounge@thelounge ~ $
I trust this provides the information that you require.
Thank you Justin for your years of work on Solus.
Edited by @JoshStrobl - Removed private Mac address.