I installed a fresh Focal image to an SSD and eth0 comes up just fine with kernel 1053. Sorry but I can't reproduce your issue. I'll close the ticket. Please open a new one should you run into this issue again.
** Changed in: linux-raspi (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1964114 Title: network interface is removed after latest update (pi4) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1964114/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs