[Pkg-systemd-maintainers] Bug#725422: systemd set kernel.sysrq=16

[Goffredo Baroncelli]

Package: systemd
Version: 204-5
Severity: important
Tags: upstream


Problem description:
After installing the systemd package some sysrq keys don't work any more.

Expected behaviour:
The systemd package must not interact with the sysrq key setting

Analysis:
The systemd package contains the file /usr/lib/sysctl.d/50-default.conf. In 
this file there is the following entry:

   # System Request functionality of the kernel (SYNC)
   kernel.sysrq = 16

which changes the allowable sysrq key. This entry is present also in the
upstream package.

Suggested solution:
Comment the entry "kernel.sysrq = 16" in the file 
/usr/lib/sysctl.d/50-default.conf.

Further information:
This bug is signalled also for suse [1] and mageia [2]. This entry was added
by the following commit [3] in the systemd git repository.

BR
G.Baroncelli <kreijack at gmail.com>


[1] Bug 820443 - https://bugzilla.novell.com/show_bug.cgi?id=820443
[2] Bug 10473 - https://bugs.mageia.org/show_bug.cgi?id=10473
[3] 0f59fe5171b5564fc6fb58f3281fbc259c45f7d0 - http://cgit.freedesktop.org/systemd/systemd/commit/sysctl.d/50-default.conf?id=0f59fe5171b5564fc6fb58f3281fbc259c45f7d0


-- Package-specific info:
--------------
systemd-delta:
--------------

0 overridden configuration files found.

--------------
systemctl dump:
--------------
[cut .. cut .. cut]
--------------
Contents of /var/lib/systemd/deb-systemd-helper-enabled:
--------------
==> /var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/rsyslog.service <==

==> /var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/lm-sensors.service <==

==> /var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/bind9.service <==

==> /var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/atd.service <==

==> /var/lib/systemd/deb-systemd-helper-enabled/syslog.service <==

==> /var/lib/systemd/deb-systemd-helper-enabled/gpsd.socket.dsh-also <==
/etc/systemd/system/sockets.target.wants/gpsd.socket

==> /var/lib/systemd/deb-systemd-helper-enabled/sockets.target.wants/gpsd.socket <==

==> /var/lib/systemd/deb-systemd-helper-enabled/gpsd.service.dsh-also <==
/etc/systemd/system/sockets.target.wants/gpsd.socket

==> /var/lib/systemd/deb-systemd-helper-enabled/lm-sensors.service.dsh-also <==
/etc/systemd/system/multi-user.target.wants/lm-sensors.service

==> /var/lib/systemd/deb-systemd-helper-enabled/bind9-resolvconf.service.dsh-also <==
/etc/systemd/system/bind9.service.wants/bind9-resolvconf.service

==> /var/lib/systemd/deb-systemd-helper-enabled/bind9.service.dsh-also <==
/etc/systemd/system/multi-user.target.wants/bind9.service

==> /var/lib/systemd/deb-systemd-helper-enabled/rsyslog.service.dsh-also <==
/etc/systemd/system/multi-user.target.wants/rsyslog.service
/etc/systemd/system/syslog.service
/etc/systemd/system/multi-user.target.wants/rsyslog.service
/etc/systemd/system/syslog.service
/etc/systemd/system/multi-user.target.wants/rsyslog.service
/etc/systemd/system/syslog.service

==> /var/lib/systemd/deb-systemd-helper-enabled/atd.service.dsh-also <==
/etc/systemd/system/multi-user.target.wants/atd.service

==> /var/lib/systemd/deb-systemd-helper-enabled/accounts-daemon.service.dsh-also <==
/etc/systemd/system/graphical.target.wants/accounts-daemon.service

==> /var/lib/systemd/deb-systemd-helper-enabled/graphical.target.wants/accounts-daemon.service <==

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.11.3 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages systemd depends on:
ii  initscripts          2.88dsf-43
ii  libacl1              2.2.52-1
ii  libaudit1            1:2.3.2-2
ii  libc6                2.17-93
ii  libcap2              1:2.22-1.2
ii  libcryptsetup4       2:1.6.1-1
ii  libdbus-1-3          1.6.14-1
ii  libgcrypt11          1.5.3-2
ii  libkmod2             9-3
ii  liblzma5             5.1.1alpha+20120614-2
ii  libpam0g             1.1.3-9
ii  libselinux1          2.1.13-3
ii  libsystemd-daemon0   204-5
ii  libsystemd-journal0  204-5
ii  libsystemd-login0    204-5
ii  libudev1             204-5
ii  libwrap0             7.6.q-24
ii  udev                 204-5
ii  util-linux           2.20.1-5.5

Versions of packages systemd recommends:
ii  libpam-systemd  204-5

Versions of packages systemd suggests:
ii  systemd-ui  2-2

-- no debconf information