Ubuntu 18.04 启动缓慢

Ubuntu 18.04 启动缓慢

在新的戴尔笔记本电脑上安装 Ubuntu 18.04 后,我想知道是否可以加快启动过程。以下是一些基本信息:

systemd-analyze

Startup finished in 3.879s (kernel) + 28.444s (userspace) = 32.323s
graphical.target reached after 28.001s in userspace

systemd-analyze blame

    11.425s dev-sda3.device
     10.386s plymouth-quit-wait.service
      8.797s plymouth-start.service
      6.751s dev-loop1.device
      6.719s dev-loop2.device
      6.599s dev-loop3.device
      6.574s dev-loop4.device
      6.565s NetworkManager-wait-online.service
      6.551s dev-loop5.device
      6.524s dev-loop7.device
      6.499s dev-loop8.device
      6.277s fwupd.service
      6.075s snap-gnome\x2dcalculator-154.mount
      5.736s snap-gnome\x2dcharacters-86.mount
      5.687s snap-gnome\x2d3\x2d26\x2d1604-64.mount
      5.656s snap-gnome\x2dsystem\x2dmonitor-39.mount
      5.621s snap-gnome\x2dlogs-31.mount
      5.245s dev-loop0.device
      2.778s udisks2.service
      2.604s networkd-dispatcher.service
      2.529s grub-common.service
      2.457s snapd.service
      2.187s gpu-manager.service
      2.057s accounts-daemon.service
      2.052s ModemManager.service
      2.017s snap-gnome\x2dsystem\x2dmonitor-36.mount
      1.946s apport.service
      1.681s systemd-udevd.service
      1.641s bolt.service
      1.618s dev-loop11.device
      1.574s dev-loop6.device
      1.573s dev-loop12.device
      1.552s dev-loop9.device
      1.543s keyboard-setup.service
      1.508s dev-loop10.device
      1.403s NetworkManager.service
      1.385s bluetooth.service
      1.379s snap-gnome\x2dcalculator-167.mount
      1.370s rsyslog.service
      1.206s systemd-tmpfiles-setup-dev.service
       929ms thermald.service
       843ms systemd-remount-fs.service
       835ms systemd-journald.service
       813ms dev-mqueue.mount
       810ms dev-hugepages.mount
       802ms sys-kernel-debug.mount
       756ms systemd-sysctl.service
       706ms snap-gnome\x2d3\x2d26\x2d1604-59.mount
       690ms systemd-fsck@dev-disk-by\x2duuid-408C\x2d72C2.service
       687ms snap-gnome\x2dcharacters-69.mount
       660ms snap-gnome\x2dlogs-25.mount
       648ms polkit.service
       644ms snap-spotify-13.mount
       635ms systemd-modules-load.service

systemd-analyze critical-chain

     graphical.target @28.001s
     └─multi-user.target @28.000s
      **└─kerneloops.service @24.171s +21ms**
        └─network-online.target @24.169s
         **└─NetworkManager-wait-online.service @17.603s +6.565s
          └─NetworkManager.service @16.197s +1.403s**
           └─dbus.service @15.305s
            └─basic.target @14.841s
             └─sockets.target @14.841s
              **└─snapd.socket @14.799s +41ms**
               └─sysinit.target @14.790s
                **└─systemd-timesyncd.service @14.580s +210ms
                  └─systemd-tmpfiles-setup.service @14.181s +366ms**
                    └─local-fs.target @14.177s
                      └─run-user-120.mount @18.907s
                        └─swap.target @13.501s
                          **└─dev-disk-by\x2duuid-91bef5fa\x2dfe6b\x2d441f                 \x2d92c3\x2dcf857dacef7e.swap @13.355s +145ms**
                            └─dev-disk-by\x2duuid-91bef5fa\x2dfe6b\x2d441f\x2d92c3\x2dcf857dacef7e.device @13.354s 

有人对如何加快启动过程有什么建议吗?

答案1

18.04 没有交换分区

有一个问题,当没有交换分区时,Ubuntu 18.04 启动速度很慢。要解决这个问题,请编辑/etc/default/grub并搜索带有 的行LINUX,然后noresume在后面添加quiet splash。它看起来会像这样:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noresume"

然后保存文件并运行:

sudo update-grub

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