Hi Tim, Thanks for the bug report.
I just responded to another user, who is also having networking issues with 6.8.0-100-generic. They were having trouble sending packets to a broadcast address, as it kept being their gateway address. I don't really know if this is the problem you are experiencing, but you can find more information on this bug, and my comment: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2141584 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2141584/comments/2 There is a patch available for that particular issue in the next kernel update. You can try it out if you like: Instructions to Install (On a noble system): 1) cat << EOF | sudo tee /etc/apt/sources.list.d/ubuntu-$(lsb_release -cs)-proposed.list # Enable Ubuntu proposed archive deb http://archive.ubuntu.com/ubuntu/ $(lsb_release -cs)-proposed main universe EOF 2) sudo apt update 3) sudo apt install linux-{image,modules,modules-extra,headers}-6.8.0-103-generic 4) sudo reboot 5) uname -rv 6.8.0-103-generic #103-Ubuntu SMP PREEMPT_DYNAMIC Tue Feb 10 13:34:59 UTC 2026 6) sudo rm /etc/apt/sources.list.d/ubuntu-$(lsb_release -cs)-proposed.list 7) sudo apt update When you run network speed tests, do you mean something like speedtest.net in a web browser, or wget a large file in the terminal, or maybe iperf test runs? If you share how you are testing I will try and reproduce. If you do try 6.8.0-103-generic, let me know how it goes. Thanks, Matthew -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2141531 Title: Network unstable on 6.8.0-100.100 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2141531/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
