Bug#1040943: systemd-logind: 'HandlePowerKey=ignore' works in logind.conf, not in logind.conf.d/custom.conf

[Diederik de Haas]

Package: systemd
Version: 253.5-1
Severity: normal

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I'm working on a Debian system/image for Pine64's PineTab2 (tablet) and
by default when I (short) press the power button, the device powers off.
Right now I'm not using any DE, so it's a CLI only system.

When I created /etc/systemd/logind.conf.d/custom.conf with
HandlePowerKey=ignore

Nothing changed after restarting systemd-logind.service or rebooting,
IOW the system shut down.
Confusingly `sudo systemd-analyze cat-config systemd/logind.conf` *did*
show the setting, making me think it was configured correctly.

The PineTab2 is shipped with an ArchLinuxARM system and when I logged
in to a VT, pressing the power button shut the system down.
But when I set `HandlePowerKey=ignore` in /etc/systemd/logind.conf,
pressing the power key got ignored.

I then renamed `custom.conf` to `custom.conf.disabled` on my Debian
system and made the change directly in /etc/systemd/logind.conf and
then it worked!
When I did the reverse on the ALARM system, so it was only configured in
logind.conf.d/custom.conf, then the tablet turned off.

So on both Debian and ALARM, when specifying `HandlePowerKey=ignore` in
/etc/systemd/logind.conf.d/custom.conf, the setting does NOT work and
the tablet powers down when pressing the power button.
But on both systems the setting does work when set in
/etc/systemd/logind.conf and pressing the power button gets ignored.

While I'm reporting it against the version in Unstable, there's a rather
high chance the issue also occurs on Testing/Trixie and probably even on
Bookworm (which my Debian system started out with).
But I only tried editing logind.conf directly after I had upgraded the
system first to Trixie and then to Sid.

Note: This bug report is NOT send from the (arm64) PineTab2 but my
normal (amd64) PC, but I don't think that matters. If it does/would, I
could start over again on the PT2, but hopefully that isn't needed.

Cheers,
  Diederik

- -- Package-specific info:

- -- System Information:
Debian Release: trixie/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'), (101, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.3.0-2-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages systemd depends on:
ii  libacl1            2.3.1-3
ii  libaudit1          1:3.1.1-1
ii  libblkid1          2.38.1-6
ii  libc6              2.37-5
ii  libcap2            1:2.66-4
ii  libcryptsetup12    2:2.6.1-4
ii  libfdisk1          2.38.1-6
ii  libgcrypt20        1.10.2-2
ii  libkmod2           30+20230519-1
ii  liblz4-1           1.9.4-1
ii  liblzma5           5.4.1-0.2
ii  libmount1          2.38.1-6
ii  libp11-kit0        0.25.0-3
ii  libseccomp2        2.5.4-1+b3
ii  libselinux1        3.5-1
ii  libssl3            3.0.9-1
ii  libsystemd-shared  253.5-1
ii  libsystemd0        253.5-1
ii  libzstd1           1.5.5+dfsg2-1
ii  mount              2.38.1-6
ii  systemd-dev        253.5-1

Versions of packages systemd recommends:
ii  dbus [default-dbus-system-bus]  1.14.8-2
ii  ntpsec [time-daemon]            1.2.2+dfsg1-1

Versions of packages systemd suggests:
ii  libfido2-1            1.13.0-1
ii  libqrencode4          4.1.1-1
ii  libtss2-esys-3.0.2-0  4.0.1-1
ii  libtss2-mu0           4.0.1-1
pn  libtss2-rc0           <none>
ii  policykit-1           122-4
ii  polkitd               122-4
pn  systemd-boot          <none>
ii  systemd-container     253.5-1
pn  systemd-homed         <none>
pn  systemd-resolved      <none>
pn  systemd-userdbd       <none>

Versions of packages systemd is related to:
ii  dbus-user-session  1.14.8-2
pn  dracut             <none>
ii  initramfs-tools    0.142
pn  libnss-systemd     <none>
ii  libpam-systemd     253.5-1
ii  udev               253.5-1

- -- no debconf information

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