Public bug reported: I was running Ubuntu 20.04 on a B550 motherboard.
I believe the 2.5gb ethernet is actually only in newer kernels normally but Ubuntu backport it. It was working fine, then I received a kernel upgrade 5.4.0-53 and the ethernet dissapeared. If I use grub to boot into the old kernel 5.4.0-52 the ethernet is there still so it appears to be the newer kernel. ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1904102 Title: Upgrade from 5.4.0-52 to 5.4.0-53 lost 2.5gbe ethernet on B550 board To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1904102/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs