[Pkg-utopia-maintainers] Bug#1032383: loopback interface (lo) no longer ignored

[Didier 'OdyX' Raboud]

Package: network-manager
Version: 1.42.2-2
Severity: normal

Hello there,

the loopback interface seems no longer ignored by NetworkManager by
default;

$ LANG=C nmcli | grep -A5 ^lo
lo: connected (externally) to lo
        "lo"
        loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536
        inet4 127.0.0.1/8
        inet6 ::1/128

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/commit/e8618f03d7d8735946a82de8ce4257dd92328b20

This is apparently a new feature of NM 1.42, but I'm arguing that in
most usual cases, having 'lo' appear (as it appears in KDE's Plasma NM
applet for example) is quite confusing to most users who will never
customize anything with regards to the 'lo' interface.

I'd propose that src:network-manager adds a conffile with that content:

[keyfile]
unmanaged-devices=interface-name:lo

This would let the loopback interface be ignored, while allowing experts
needing this to get the new 'lo' managed interface.

Best,

OdyX

-- System Information:
Debian Release: 12.0
  APT prefers buildd-unstable
  APT policy: (500, 'buildd-unstable'), (500, 'unstable'), (500, 'testing'), (1, 'buildd-experimental'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-5-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=fr_CH.UTF-8, LC_CTYPE=fr_CH.UTF-8 (charmap=UTF-8), LANGUAGE=fr_CH:fr
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages network-manager depends on:
ii  adduser                         3.131
ii  dbus [default-dbus-system-bus]  1.14.6-1
ii  libaudit1                       1:3.0.9-1
ii  libbluetooth3                   5.66-1
ii  libc6                           2.36-8
ii  libcurl3-gnutls                 7.88.1-2
ii  libglib2.0-0                    2.74.6-1
ii  libgnutls30                     3.7.9-1
ii  libjansson4                     2.14-2
ii  libmm-glib0                     1.20.4-1
ii  libndp0                         1.8-1
ii  libnewt0.52                     0.52.23-1+b1
ii  libnm0                          1.42.2-2
ii  libpsl5                         0.21.2-1
ii  libreadline8                    8.2-1.3
ii  libselinux1                     3.4-1+b5
ii  libsystemd0                     252.6-1
ii  libteamdctl0                    1.31-1
ii  libudev1                        252.6-1
ii  policykit-1                     122-3
ii  polkitd                         122-3
ii  udev                            252.6-1

Versions of packages network-manager recommends:
ii  dnsmasq-base [dnsmasq-base]  2.89-1
ii  libpam-systemd               252.6-1
ii  modemmanager                 1.20.4-1
ii  ppp                          2.4.9-1+1.1+b1
ii  wireless-regdb               2022.06.06-1
ii  wpasupplicant                2:2.10-12

Versions of packages network-manager suggests:
ii  iptables       1.8.9-2
pn  libteam-utils  <none>

Versions of packages network-manager is related to:
ii  isc-dhcp-client  4.4.3-P1-1.1

-- no debconf information