Bug#879473: systemd-logind: systemd process(es) consuming CPU when laptop lid closed

[Glen B]

Package: systemd
Version: 232-25+deb9u1
Severity: normal
File: systemd-logind

   * What led up to the situation?
It had been a while since my system was booted and connected to the internet. I started it around the beginning of October and installed multiple package updates. After doing so and leaving my laptop/server alone for awhile, I noticed the CPU fan working unusually hard. Multiple processes are found consuming lots of CPU. But if I open the laptop lid, they stop. My laptop is *not* supposed to do anything when the lid is closed.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
I discovered that I had renamed the logind.conf file to logind.conf.bak. If it's renamed back to logind.conf, the problem goes away.


   * What outcome did you expect instead?
According to the comments in the conf file, a new one is supposed to be generated if it does not exist. This functionality does not appear to work.

Please see logind.conf-changes for a list of changes I've made to the default logind.conf file. As long as these changes are present, I don't experience the CPU consumption bug. pkgchanges.txt are a list of package changes I had done on my system since booting it in October and subsequently noticing the issue. topoutput.txt is a snapshot of top during this CPU consumption.

If I run the command dbus-monitor --system during this bug, it outputs a lot of information very quickly. Attached as dbus-monitor-system.txt is a short sample of this output.


-- Package-specific info:

-- System Information:
Debian Release: 9.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 4.9.0-4-686-pae (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages systemd depends on:
ii  adduser         3.115
ii  libacl1         2.2.52-3+b1
ii  libapparmor1    2.11.0-3
ii  libaudit1       1:2.6.7-2
ii  libblkid1       2.29.2-1
ii  libc6           2.24-11+deb9u1
ii  libcap2         1:2.25-1
ii  libcryptsetup4  2:1.7.3-4
ii  libgcc1         1:6.3.0-18
ii  libgcrypt20     1.7.6-2+deb9u2
ii  libgpg-error0   1.26-2
ii  libidn11        1.33-1
ii  libip4tc0       1.6.0+snapshot20161117-6
ii  libkmod2        23-2
ii  liblz4-1        0.0~r131-2+b1
ii  liblzma5        5.2.2-1.2+b1
ii  libmount1       2.29.2-1
ii  libpam0g        1.1.8-3.6
ii  libseccomp2     2.3.1-2.1
ii  libselinux1     2.6-3+b3
ii  libsystemd0     232-25+deb9u1
ii  mount           2.29.2-1
ii  procps          2:3.3.12-3
ii  util-linux      2.29.2-1

Versions of packages systemd recommends:
ii  dbus            1.10.22-0+deb9u1
ii  libpam-systemd  232-25+deb9u1

Versions of packages systemd suggests:
pn  policykit-1        <none>
pn  systemd-container  <none>
pn  systemd-ui         <none>

Versions of packages systemd is related to:
pn  dracut           <none>
ii  initramfs-tools  0.130
ii  udev             232-25+deb9u1

-- Configuration Files:
/etc/systemd/logind.conf [Errno 2] No such file or directory: '/etc/systemd/logind.conf'

-- no debconf information
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