boot time over 10min

[utilisateurcherchepseudo]

Hi

i have Ubuntu on a dual boot. BTW my windows has UEFI boot
also note that i'm a newbie, please dont assume I know...
i have reinstalled several times and boot time is still over 10min

as advised I ran systemd-analyze critical-chain
hope someone can help.

graphical.target @1min 58.679s
└─multi-user.target @1min 58.679s
  └─plymouth-quit-wait.service @35.891s +1min 22.788s
    └─systemd-user-sessions.service @35.853s +34ms
      └─network.target @35.837s
        └─NetworkManager.service @29.382s +6.454s
          └─dbus.service @29.377s
            └─basic.target @29.218s
              └─sockets.target @29.218s
                └─snapd.socket @29.215s +2ms
                  └─sysinit.target @29.068s
                    └─systemd-timesyncd.service @28.796s +272ms
                      └─systemd-tmpfiles-setup.service @28.631s +154ms
                        └─systemd-journal-flush.service @5.040s +23.588s
                          └─systemd-journald.service @4.443s +595ms
                            └─systemd-journald.socket @4.419s
                              └─-.mount @4.405s
                                └─-.slice @4.405s

[TheFu]

Above says boot was 2 minutes.
Check the log files for bad hardware and look for reasons any network issues could be slow.

[utilisateurcherchepseudo]

Hi, thanks for your reply.
stragely enough i rebooted and checked boot time with my watch. real boot time was above 5min last tine. yet log shows less. see below:

graphical.target @2min 37.232s
└─multi-user.target @2min 37.232s
  └─plymouth-quit-wait.service @34.431s +2min 2.799s
    └─systemd-user-sessions.service @34.392s +35ms
      └─network.target @34.378s
        └─NetworkManager.service @29.351s +5.027s
          └─dbus.service @29.345s
            └─basic.target @29.211s
              └─sockets.target @29.211s
                └─snapd.socket @29.208s +1ms
                  └─sysinit.target @29.120s
                    └─snapd.apparmor.service @26.553s +2.566s
                      └─apparmor.service @24.906s +1.646s
                        └─local-fs.target @24.904s
                          └─run-snapd-ns-snapd\x2ddesktop\x2dintegration.mnt.mount @1min 1.069s
                            └─run-snapd-ns.mount @53.666s
                              └─local-fs-pre.target @7.637s
                                └─systemd-tmpfiles-setup-dev.service @5.900s +1.736s
                                  └─systemd-sysusers.service @4.885s +1.011s
                                    └─systemd-remount-fs.service @4.712s +153ms
                                      └─systemd-journald.socket @4.607s
                                        └─system.slice @4.594s
                                          └─-.slice @4.594s

please let me know how to check logs, i have NO idea

[yancek]

The log files are located in the /var/log directory which includes boot.log files.

[oldfred]

Some things to review, may have duplication but some have more info:

https://ubuntuforums.org/showthread.php?t=2450783
https://ubuntuforums.org/showthread....9#post13932499
https://ubuntuforums.org/showthread.php?t=2417453 &
https://ubuntuforums.org/showthread....2#post13857392 &
https://www.dedoimedo.com/computers/...slow-boot.html
https://askmeaboutlinux.com/2019/11/...-boots-slowly/

https://askubuntu.com/questions/1284...04-boot-faster

SSD drives now are a lot lower in cost and can speed up slow systems a lot.

[MAFoElffen]

So... are you time (with your wrist watch, the time up to the display of the graphical login screen? Or including from that to the display of the desktop?

[ian-weisser]

plymouth-quit-wait.service @35.891s +1min 22.788s

That's the one to look into.

Please show the output of

cat /lib/systemd/system/plymouth-quit-wait.service
cat /etc/systemd/system/plymouth-quit-wait.service
systemd-analyze blame

[TheFu]

Hi, thanks for your reply.
stragely enough i rebooted and checked boot time with my watch. real boot time was above 5min last tine. yet log shows less. see below:
...
please let me know how to check logs, i have NO idea

To learn about most things, using a web search would be a good idea. "ubuntu log files" is what I'd suggest. There are many techniques and there might be a program to make it easier (IDK).

Also, systemd-analyze output doesn't always say what it appears to say. That's where reading the documentation carefully will be helpful to understand all the caveats about the output for each option. There's little need for people to reproduce any documentation already on your system. Most of the options have good explanations and examples to show what can be known. For example, "blame" sorts by the time, not in the order.
All this information is hidden in the manpage ... well, hidden to people who don't read manpages. For example,

   systemd-analyze blame
       This command prints a list of all running units, ordered by the time they
       took to initialize. This information may be used to optimize boot-up times.
       Note that the output might be misleading as the initialization of one service
       might be slow simply because it waits for the initialization of another
       service to complete. Also note: systemd-analyze blame doesn't display results
       for services with Type=simple, because systemd considers such services to be
       started immediately, hence no measurement of the initialization delays can be
       done. Also note that this command only shows the time units took for starting
       up, it does not show how long unit jobs spent in the execution queue. In
       particular it shows the time units spent in "activating" state, which is not
       defined for units such as device units that transition directly from
       "inactive" to "active". This command hence gives an impression of the
       performance of program code, but cannot accurately

There are lots of "misleading" notes in the manpage.

[utilisateurcherchepseudo]

until login. after login the time is (usually, not always) very decent

[oldfred]

One setting I change is this in /etc/default/grub:

changed from quiet splash to noplymouth, will see boot process rather than Ubuntu logo.
It used to be slow enough I could track entries. They are what gets posted to log files.
But with new faster SSD, it scrolls by very fast. If errors it stops, but last entry is rarely the issue, usually several before last entry.