我的笔记本电脑启动速度非常慢。我刚接触 Ubuntu，两周前才安装。我注意到启动画面需要很长时间才能显示出来。
编辑：我已经完全禁用了 plymouth，现在 systemd-analyze 显示启动需要 50 秒。但是 1 手动计时启动，从紫屏到登录屏幕花了 1 分 40 秒。
以下是 systemd-analyze blame 所抛出的内容。
30.953s plymouth-quit-wait.service
17.755s dev-sda3.device
16.487s udisks2.service
15.090s snapd.service
13.693s ModemManager.service
13.330s networkd-dispatcher.service
12.431s keyboard-setup.service
10.931s grub-common.service
9.981s apport.service
9.902s accounts-daemon.service
9.884s networking.service
8.476s plymouth-start.service
8.165s NetworkManager.service
7.896s avahi-daemon.service
7.859s iio-sensor-proxy.service
7.849s lm-sensors.service
7.694s alsa-restore.service
7.353s thermald.service
7.350s wpa_supplicant.service
7.337s systemd-logind.service
7.003s rsyslog.service
6.993s gpu-manager.service
5.309s apparmor.service
5.268s systemd-journal-flush.service
这是 systemd-analyze critical-chain
graphical.target @1min 11.916s
└─multi-user.target @1min 11.915s
└─snapd.seeded.service @46.467s +66ms
└─snapd.service @31.374s +15.090s
└─basic.target @30.524s
└─sockets.target @30.523s
└─snapd.socket @30.506s +16ms
└─sysinit.target @30.447s
└─apparmor.service @25.137s +5.309s
└─local-fs.target @25.030s
└─boot-efi.mount @24.843s +187ms
└─systemd-fsck@dev-disk-by\x2duuid-D004\x2dD4FC.service @24.487s +322ms
└─dev-disk-by\x2duuid-D004\x2dD4FC.device @24.472s
有什么帮助吗？提前致谢