Bug#785484: systemd: on Raspberry pi B+, several essential services fail, including systemd-logind

[Johannes Rohr]

Dear all,

I assume that Bernhard has spotted the culprit. Personally, I cannot 
reproduce the bug now just by reinstalling those packages, as I had 
purged the original configuration, so it is probably something carried 
over during the upgrade from wheezy.

Cheers,

Johannes

Am 18.05.2015 um 19:04 schrieb Bernhard Übelacker:
> Hello,
> as I got the same problem on my raspberry, probably I can give
> some details.
>
> This is the situation I started:
> - put 2015-05-05-raspbian-wheezy.img on SD-card and booted
> - changed sources.list and did the upgrade
> - appended "systemd.debug-shell" to /boot/cmdline.txt
> - reboot
>
> For some reason it looks like /etc/init.d/cgroup-bin is still
> installed even cgroup-bin is a transitional package.
>
> This script tries to mount /sys/fs/cgroup/memory but seems to fail
> and it then unmounts /sys/fs/cgroup.
> Therefore systemd cannot create new cgroups or spawning
> processes cannot attach to them.
>
> By purging just cgroup-bin I got expected booting again.
>
> cgroup-bin[455]: Kernel lacks cgroups or memory controller not available, not starting cgroups. ... (warning).
> systemd[1]: Failed to create cgroup /system.slice/ntp.service: No such file or directory
> systemd[481]: Failed at step CGROUP spawning /etc/init.d/ntp: No such file or directory
>
>
> Kind regards,
> Bernhard
>
>
>
> root at raspberrypi:/# dpkg -l cgroup-bin
> Desired=Unknown/Install/Remove/Purge/Hold
> | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
> ||/ Name                       Version            Architecture       Description
> +++-==========================-==================-==================-=========================================================
> ii  cgroup-bin                 0.41-6             all                control and monitor control groups (transitional package)
>
>
>
> root at raspberrypi:/# dpkg -L cgroup-bin
> /.
> /usr
> /usr/share
> /usr/share/doc
> /usr/share/doc/cgroup-bin
> /usr/share/doc/cgroup-bin/changelog.Debian.gz
> /usr/share/doc/cgroup-bin/copyright
> /etc/init.d/cgroup-bin
>
>
>
> root at raspberrypi:/# ls -lisah /etc/init.d/cgroup-bin
> 36115 4.0K -rwxr-xr-x 1 root root 950 Dec 18  2013 /etc/init.d/cgroup-bin
>
>
>
> root at raspberrypi:/# cat /etc/init.d/cgroup-bin
> #! /bin/sh
> ### BEGIN INIT INFO
> # Provides:          init-cgroups
> # Required-Start:    mountkernfs
> # Required-Stop:
> # Default-Start:     2 3 4 5
> # Default-Stop:      0 1 6
> # Short-Description: Mounts cgroup filesystems
> ### END INIT INFO
>                                                                                                                                                                                                                                               
> PATH=/sbin:/bin
>
> . /lib/lsb/init-functions
>
> do_start () {
>          log_action_msg "Initializing cgroups"
>          mount -t tmpfs none /sys/fs/cgroup
>          mkdir /sys/fs/cgroup/memory
>          if ! mount -t cgroup none /sys/fs/cgroup/memory -o memory 2> /dev/null; then
>                  umount /sys/fs/cgroup
>                  log_warning_msg "Kernel lacks cgroups or memory controller not available, not starting cgroups."
>                  exit 0
>          fi
>          chmod a+r /sys/fs/cgroup/memory/memory.pressure_level
> }
>
> case "$1" in
>    start)
>          do_start
>          ;;
>    restart|reload|force-reload)
>          echo "Error: argument '$1' not supported" >&2
>          exit 3
>          ;;
>    stop)
>          # No-op
>          ;;
>    *)
>          echo "Usage: $0 start|stop" >&2
>          exit 3
>          ;;
> esac
>
>
>
> root at raspberrypi:/root# dpkg --purge cgroup-bin
> (Reading database ... 100744 files and directories currently installed.)
> Removing cgroup-bin (0.41-6) ...
> Purging configuration files for cgroup-bin (0.41-6) ...
>
>
>
> root at raspberrypi:/root# reboot -f
>    # as regular reboot did not work at this point anymore