Ubuntu – 15.04 – very slow boot

After upgrading to 15.04 , one computer is very, very slow to boot -several minutes, instead of ~20sec.

I do not know if this helps:

graphical.target @1min 40.961s
└─multi-user.target @1min 40.961s
 └─kerneloops.service @1min 36.392s +16ms
 └─network-online.target @1min 36.391s
  └─network.target @1min 30.948s
    └─wpa_supplicant.service @1min 31.430s +6ms
      └─basic.target @1min 30.414s
        └─sockets.target @1min 30.414s
          └─acpid.socket @1min 30.414s
            └─sysinit.target @1min 30.412s
              └─networking.service @1.941s +49ms
                └─apparmor.service @1.383s +555ms
                  └─local-fs.target @1.381s
                    └─media-andre-6564\x2d3236.mount @2min 17.386s
                      └─local-fs-pre.target @1.375s
                        └─systemd-remount-fs.service @1.328s +41ms
                          └─systemd-fsck-root.service @1.197s +129ms
                            └─system.slice @324ms
                              └─-.slice @323ms

andre@andre-Latitude-E5520:~$ systemd 
Failed to create root cgroup hierarchy: Permission denied
Failed to allocate manager object: Permission denied