Comment 13 for bug 1549363

Unprivileged LXC still fails to start here...

kernel: 4.4.0-9.24
lxc: 2.0.0~rc4-0ubuntu1

$ lxc-start -d -n i386-trusty-gui
lxc-start: lxc_start.c: main: 344 The container failed to start.
lxc-start: lxc_start.c: main: 346 To get more details, run the container in foreground mode.
lxc-start: lxc_start.c: main: 348 Additional information can be obtained by setting the --logfile and --logpriority options.

$ lxc-start -F -n i386-trusty-gui
lxc-start: cgfs.c: lxc_cgroupfs_create: 882 Could not set clone_children to 1 for cpuset hierarchy in parent cgroup.
lxc-start: cgfs.c: cgroup_rmdir: 208 Permission denied - cgroup_rmdir: failed to delete /sys/fs/cgroup/memory/user.slice
lxc-start: cgfs.c: cgroup_rmdir: 208 Read-only file system - cgroup_rmdir: failed to delete /sys/fs/cgroup/perf_event/
lxc-start: cgfs.c: cgroup_rmdir: 208 Read-only file system - cgroup_rmdir: failed to delete /sys/fs/cgroup/net_cls,net_prio/
lxc-start: cgfs.c: cgroup_rmdir: 208 Read-only file system - cgroup_rmdir: failed to delete /sys/fs/cgroup/freezer/
lxc-start: cgfs.c: cgroup_rmdir: 208 Permission denied - cgroup_rmdir: failed to delete /sys/fs/cgroup/cpu,cpuacct/user.slice
lxc-start: cgfs.c: cgroup_rmdir: 208 Permission denied - cgroup_rmdir: failed to delete /sys/fs/cgroup/blkio/user.slice
lxc-start: cgfs.c: cgroup_rmdir: 208 Read-only file system - cgroup_rmdir: failed to delete /sys/fs/cgroup/cpuset/
lxc-start: cgfs.c: cgroup_rmdir: 208 Read-only file system - cgroup_rmdir: failed to delete /sys/fs/cgroup/hugetlb/
lxc-start: cgfs.c: cgroup_rmdir: 208 Permission denied - cgroup_rmdir: failed to delete /sys/fs/cgroup/devices/user.slice
lxc-start: cgfs.c: cgroup_rmdir: 208 Permission denied - cgroup_rmdir: failed to delete /sys/fs/cgroup/pids/user.slice/user-1000.slice/session-c2.scope
lxc-start: cgfs.c: cgroup_rmdir: 208 Permission denied - cgroup_rmdir: failed to delete /sys/fs/cgroup/systemd/user.slice/user-1000.slice/session-c2.scope
lxc-start: start.c: lxc_spawn: 1033 failed creating cgroups
lxc-start: start.c: __lxc_start: 1276 failed to spawn 'i386-trusty-gui'
lxc-start: lxc_start.c: main: 344 The container failed to start.
lxc-start: lxc_start.c: main: 348 Additional information can be obtained by setting the --logfile and --logpriority options.