Ubuntu – Slow boot on Ubuntu 18.04

18.04bootperformance

After installing Ubuntu 18.04 on my new Dell Laptop, I'm wondering wether it is possible to speed up the booting process. Here is some basic information:

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

and 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

Does anyone have any suggestions on how to speed up the booting process?

Best Answer

18.04 with no swap partition

There is a glitch where Ubuntu 18.04 is boots slow when there is no swap partition. To circumvent this edit /etc/default/grub and search for the line with LINUX and add noresume after quiet splash. It will look something like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noresume"

Then save the file and run:

sudo update-grub
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