The recent kernel update to version 5.4.0-59-lowlatency solved the problem for me. The Ethernet works correctly.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906655 Title: Ethernet interface broken (Flags mismatch irq) after upgrading to kernel 5.8.0-31 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1906655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs