我刚刚升级到16.04 LTS，很抱歉我做到了。15 有一些怪癖，但这是不可能的。
启动需要很长时间，systemd-analyze blame报告：
3min 261ms powerd.service
22.414s wicd.service
22.094s click-system-hooks.service
17.258s NetworkManager-wait-online.service
16.820s apport.service
16.813s irqbalance.service
16.544s networking.service
16.279s stunnel4.service
12.719s grub-common.service
12.047s dev-sda1.device
11.933s ondemand.service
11.382s speech-dispatcher.service
9.283s lightdm.service
8.955s apt-daily.service
8.020s apparmor.service
7.109s pulseaudio.service
6.685s winbind.service
6.673s nmbd.service
6.410s samba-ad-dc.service
6.036s user@1000.service
5.834s ModemManager.service
5.182s console-kit-log-system-start.service
5.001s systemd-user-sessions.service
有人可以提出任何建议吗？