Network Connection not working with Ubuntu 24.04.2 and Realtek r8125 Ethernet/WiFi

[jimbobstpaul]

This is becoming a “well-known problem” with Ubuntu 24.04.x (maybe especially 24.04.2) and RTL8125. One interesting difference between your situation and mine is that my Wi-Fi always works (so far, anyway). Like you, Jonathan, I can’t remember all the different things I tried, but I know I used both the CLI version and the GUI version of Network Manager, and it seemed to work well, at least for the Wi-Fi.

See

RTL8125 2.5GbE Ethernet port not working in Ubuntu 24.04

Hi. I am by no means good at troubleshooting Linux, but I have built dozens of computers over the years, and helped many people with their computer stuff, and I have never had even one problem with Ethernet connections to the Internet. Here is my current problem, no Ethernet connection to my LAN: Ubuntu Version: Ubuntu 24.04.2 LTS Desktop Environment (if applicable): ubuntu:GNOME Problem Description: Once I get the wireless-info script working, or I learn a workaround, I can start a new pos…

One user seems to have got Ethernet working on Ubuntu Server, but I haven’t tested his methods on my Desktop. See

No Network Connection with 24.04 and r8125 Ethernet

Ubuntu Version: Ubuntu Server 24.04.2 LTS Problem Description: I am unable to get a wired ethernet connection on my server. The interface is not recognized by the standard install, but I followed the instructions posted in this thread. I can see the hardware is now detected: > lscpi -k 01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller (rev 0c) Subsystem: ASUSTeK Computer Inc. RTL8125 2.5GbE Controller Kernel driver in use: r8125 Kernel modules: r81…

I also wish I knew more about showing which driver the OS is actually using to run that ethernet device, but that is way beyond my abilities at this point.

I agree with @Jeremy31 and others who recommend that we document error messages in test scenarios and file bug reports with Ubuntu.

For my part, when I again have access to my target system, I plan to try a couple of scripts that I got recently from ChatGPT, which actually seem to work on another Linux box, which detect “version incompatibilities” in libraries and executables, but that’s a longshot, I think.

Jim