I should say here that I don't really know what changes to subiquity are desirable here. I don't really like the idea of subiquity always using set-name, that just feels wrong, but I can see the problem here too.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1940860 Title: Mellanox NIC interface names change between 5.4 and 5.8 Status in subiquity: New Status in linux package in Ubuntu: Confirmed Status in systemd package in Ubuntu: New Bug description: I noticed on a couple of systems that my network interface names change when upgrading from the focal LTS (5.4) kernel to the focal HWE (both 5.8 & 5.11) kernels. Both systems have Mellanox Connect-X 5 NICs. dannf@bizzy:~$ uname -a Linux bizzy 5.4.0-81-generic #91-Ubuntu SMP Thu Jul 15 19:10:30 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux dannf@bizzy:~$ ls /sys/class/net enp1s0f0 enp1s0f1 enx3e8734bc294f lo dannf@bizzy:~$ uname -a Linux bizzy 5.8.0-63-generic #71~20.04.1-Ubuntu SMP Thu Jul 15 17:46:44 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux dannf@bizzy:~$ ls /sys/class/net enp1s0f0np0 enp1s0f1np1 enx3e8734bc294f lo dannf@bizzy:~$ uname -a Linux bizzy 5.11.0-27-generic #29~20.04.1-Ubuntu SMP Wed Aug 11 15:58:08 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux dannf@bizzy:~$ ls /sys/class/net enp1s0f0np0 enp1s0f1np1 enx3e8734bc294f lo I bisected this down to a kernel change: # first bad commit: [c6acd629eec754a9679f922d51f90e44c769b80c] net/mlx5e: Add support for devlink-port in non-representors mode The impact is that your network can fail to come up after transitioning from the LTS kernel to the HWE kernel. Now, this isn't a huge problem for MAAS installs because MAAS configures netplan to always use the same names as were used at commissioning. It does impact subiquity based installs however, which do not. To manage notifications about this bug go to: https://bugs.launchpad.net/subiquity/+bug/1940860/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
