Package: release-notes Severity: normal Dear Maintainer,
as reported in https://bugs.debian.org/1105223, the systemd predictable network device names change between bookworm and its default 6.1 kernel and trixie's 6.12 kernel for interfaces using the i40e driver. in particular it seems that the newer kernel starts setting the phys_port_name: ia2060# uname -vr 6.1.0-20-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.85-1 (2024-04-11) ia2060# cat /sys/devices/pci0000:5d/0000:5d:00.0/0000:5e:00.0/net/enp94s0f0/phys_port_name cat: '/sys/devices/pci0000:5d/0000:5d:00.0/0000:5e:00.0/net/enp94s0f0/phys_port_name': Operation not supported ia2060# uname -vr 6.12.22+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.22-1~bpo12+1 (2025-04-25) ia2060# cat /sys/devices/pci0000:5d/0000:5d:00.0/0000:5e:00.0/net/enp94s0f0np0/phys_port_name p0 this and similar bugs have been closed as "This is expected due to kernel changes." however, from a user's point of view losing networking on reboot was very much unexpected and might benefit from being documented in the trixie release notes[1]. per the Network device naming schemes document[2] setting the ID_NET_NAME_ALLOW udev property might disable this behavior if it can be predicted (untested locally). thank you for your time and effort in maintaining debian. andy 1. https://lists.debian.org/debian-backports/2025/05/msg00006.html 2. https://www.freedesktop.org/software/systemd/man/latest/systemd.net-naming-scheme.html
