I've had this occur on another system, and this time I could debug it a little more freely. This is an interesting output:
# dpkg --purge --simulate systemd dpkg: dependency problems prevent removal of systemd: snapd depends on systemd (>= 204-5ubuntu20.20); however: Package systemd is to be removed. dpkg: error processing package systemd (--purge): dependency problems - not removing Errors were encountered while processing: systemd Now, why snapd was installed I'm not sure, but I guess that's what installed systemd, since the snapd package depends on systemd. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1668123 Title: lxc fails to start with cgroup error Status in systemd package in Ubuntu: New Bug description: After rebooting a KVM instance hosting LXCs, we get the following error: $ sudo lxc-ls --fancy lxc: cgmanager.c: lxc_cgmanager_escape: 331 call to cgmanager_move_pid_abs_sync(name=dsystemd) failed: invalid request and the LXCs won't start up. In the error logs it showed: lxc-start 1487906073.534 ERROR lxc_cgfs - cgfs.c:lxc_cgroupfs_create:873 - Could not find writable mount point for cgroup hierarchy 11 while trying to create cgroup. The only way I could get the lxcs started was to stop and start cgmanager, just a simple restart wasn't sufficient. Please let me know if you need any further information. $ lsb_release -a Description: Ubuntu 14.04.5 LTS Release: 14.04 $ dpkg-query -W systemd systemd 204-5ubuntu20.24 $ dpkg-query -W cgmanager cgmanager 0.24-0ubuntu7.5 $ dpkg-query -W lxc lxc 1.0.9-0ubuntu2 $ uname -a Linux infra 3.13.0-110-generic #157-Ubuntu SMP Mon Feb 20 11:54:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1668123/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
