几天前我从 16.04 更新到了 16.10，从那时起我的启动速度就变得非常非常慢。我安装的是 Ubuntu Mate，现在我只使用 gnome-shell 桌面环境。
我运行了systemd-analyze plot，结果 html 文件的标题是
Startup finished in 5.339s (firmware) + 4.470s (loader) + 10.464s (kernel) + 54.202s (userspace) = 1min 14.477s
Ubuntu 16.10 andrea-Lenovo-Z50-70（Linux 4.8.0-22-generic #24-Ubuntu SMP 2016 年 10 月 8 日星期六 09:15:00 UTC）x86-64
命令systemd-analyze blame给出的是
24.324s irqbalance.service
18.427s preload.service
17.988s dev-sda8.device
14.710s keyboard-setup.service
13.505s networking.service
13.448s systemd-sysctl.service
13.383s systemd-udevd.service
11.562s accounts-daemon.service
10.657s click-system-hooks.service
9.196s mysql.service
8.598s loadcpufreq.service
8.554s ModemManager.service
7.840s vboxdrv.service
7.211s speech-dispatcher.service
7.052s systemd-logind.service
6.912s lm-sensors.service
6.906s gpu-manager.service
6.899s apport.service
6.893s alsa-restore.service
6.887s nvidia-persistenced.service
6.875s thinkfan.service
6.871s rsyslog.service
6.859s avahi-daemon.service
6.457s grub-common.service
5.932s NetworkManager.service
2.829s systemd-fsck@dev-disk-by\x2duuid-1432\x2dA7AD.service
2.188s colord.service
2.182s media-Archivio.mount
1.823s [email protected]
1.588s apparmor.service
1.438s wpa_supplicant.service
1.211s udisks2.service
1.128s lightdm.service
1.098s plymouth-quit-wait.service
1.078s systemd-tmpfiles-setup-dev.service
1.061s systemd-modules-load.service
1.000s snapd.firstboot.service
905ms upower.service
807ms polkitd.service
788ms binfmt-support.service
708ms rtkit-daemon.service
570ms dev-sda9.swap
515ms packagekit.service
448ms ntp.service
383ms plymouth-start.service
306ms systemd-resolved.service
294ms pppd-dns.service
251ms boot-efi.mount
226ms systemd-udev-trigger.service
223ms dev-mqueue.mount
216ms systemd-backlight@backlight:intel_backlight.service
204ms setvtrgb.service
201ms systemd-tmpfiles-setup.service
201ms proc-sys-fs-binfmt_misc.mount
190ms sys-kernel-debug.mount
189ms dev-hugepages.mount
178ms systemd-hostnamed.service
165ms hddtemp.service
156ms kmod-static-nodes.service
150ms tlp.service
149ms systemd-update-utmp.service
146ms rc-local.service
140ms systemd-journald.service
135ms openvpn.service
122ms systemd-user-sessions.service
122ms dns-clean.service
105ms vboxballoonctrl-service.service
104ms vboxweb-service.service
103ms vboxautostart-service.service
103ms systemd-journal-flush.service
102ms console-setup.service
80ms systemd-remount-fs.service
53ms systemd-random-seed.service
36ms clamav-daemon.socket
36ms snapd.socket
32ms plymouth-read-write.service
12ms snapd.boot-ok.service
9ms cpufrequtils.service
8ms ureadahead-stop.service
5ms systemd-update-utmp-runlevel.service
2ms resolvconf.service
2ms sys-fs-fuse-connections.mount
并且critical-chain是
The time after the unit is active or started is printed after the "@" character.
设备启动所需的时间打印在“+”字符后面。
graphical.target @51.810s
└─multi-user.target @51.809s
└─preload.service @33.381s +18.427s
└─basic.target @26.477s
└─sockets.target @26.477s
└─snapd.socket @26.440s +36ms
└─sysinit.target @26.376s
└─apparmor.service @24.788s +1.588s
└─local-fs.target @24.559s
└─boot-efi.mount @24.307s +251ms
└─systemd-fsck@dev-disk-by\x2duuid-1432\x2dA7AD.service @21.427s +2.829s
└─dev-disk-by\x2duuid-1432\x2dA7AD.device @21.413s
我怎样才能让启动时间正常？谢谢