16.04 inicialização lenta LTS

Question

Eu fiz o upgrade para 16.04 LTS, a inicialização agora dura 3min 14.784s em vez de 25s.

Startup finished in 3.973s (firmware) + 3.060s (loader) + 7.361s (kernel) + 3min 388ms (userspace) = 3min 14.784s

systemd-analyze blame relatórios:

       1.442s apparmor.service
       438ms dev-sda6.device
       248ms plymouth-quit-wait.service
       222ms lightdm.service
       157ms upower.service
       154ms plymouth-read-write.service
       146ms gpu-manager.service
       141ms systemd-udev-trigger.service
       132ms ModemManager.service
       127ms accounts-daemon.service
        70ms systemd-logind.service
        66ms systemd-fsck@dev-disk-by\x2duuid-80A8\x2d4F2E.service
        62ms apport.service
        56ms grub-common.service
        54ms systemd-hostnamed.service
        51ms NetworkManager.service
        50ms irqbalance.service
        50ms ondemand.service
        47ms speech-dispatcher.service
        39ms systemd-localed.service
        35ms plymouth-start.service
        34ms networking.service
        33ms udisks2.service
        30ms systemd-journald.service
        28ms pppd-dns.service
        28ms rsyslog.service
        27ms systemd-udevd.service
        25ms systemd-user-sessions.service
        24ms alsa-restore.service
        24ms wpa_supplicant.service
        24ms console-setup.service
        20ms thermald.service
        19ms systemd-modules-load.service
        16ms avahi-daemon.service
        16ms [email protected]
        16ms colord.service
        11ms systemd-update-utmp.service
         9ms polkitd.service
         9ms systemd-journal-flush.service
         8ms systemd-timesyncd.service
         7ms systemd-tmpfiles-setup.service
         7ms sys-kernel-debug.mount
         6ms dev-mqueue.mount
         6ms boot-efi.mount
         6ms dev-hugepages.mount
         5ms kmod-static-nodes.service
         5ms systemd-rfkill.service
         4ms ufw.service
         4ms systemd-tmpfiles-setup-dev.service
         4ms dns-clean.service
         4ms rtkit-daemon.service
         4ms rc-local.service
         4ms systemd-remount-fs.service
         3ms ureadahead-stop.service
         3ms resolvconf.service
         3ms systemd-update-utmp-runlevel.service
         2ms sys-fs-fuse-connections.mount
         2ms systemd-sysctl.service
         2ms systemd-random-seed.service
         1ms systemd-backlight@backlight:intel_backlight.service

Bootchart: link

Modo de recuperação

journalctl -b -u networking.service relatórios:

   -- Logs begin at Mi 2016-05-25 18:12:49 CEST, end at Mi 2016-05-25 18:39:32 CEST
Mai 25 18:12:50 helios systemd[1]: Starting Raise network interfaces...
Mai 25 18:12:50 helios systemd[1]: Started Raise network interfaces.

Qualquer ajuda será muito apreciada!