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I recently installed Ubuntu 17.04 on my laptop that has 4 GB RAM, 1 TB Disk space, and 64 bit processor. To my horror, it takes about three and half hours to boot-up. I ran the following commands with their corresponding outputs below.

Output of systemd-blame

Startup finished in 8.860s (firmware) + 4.572s (loader) + 5.593s (kernel) + 3h 34min 27.734s (userspace) = 3h 34min 46.761s

Output of systemd-blame analyze

Snapshot of the output here

So, the two processes that are causing this traumatizing slow boot-up times are

  • apparmor.service, and
  • plymouth-read-write.service

I couldn't find anything comprehensible about these two processes to indicate their importance during start-up. Can anyone provide some insights and help me speed up the bootup time through either disabling them or suggesting a way around?

Sanjay
  • 153
  • That is one amazing boot time. – Panther Sep 24 '17 at 21:13
  • Something seems misconfigured. Check your logs for errors and see https://askubuntu.com/questions/760694/really-slow-boot-on-16-04 . Check your swap partition and make the edits in /etc/systemd/system.conf . Does a live flash drive take this long ? – Panther Sep 24 '17 at 21:19
  • No @bodhi.zazen, a flash drive doesn't take this long. Let me check swap and other partitions. – Sanjay Sep 24 '17 at 21:35
  • What about booting an old kernel ? – Panther Sep 24 '17 at 21:39
  • @bodhi.zazen,
    1. The UUIDs obtained from sudo blkid & /etc/fstab matched exactly. However, there was no entry for 'swap' in the output from former and was

    /swapfile none swap sw 0 0 in latter. Could this be the problem?

    1. I uncommented

    DefaultTimeoutStartSec=90s, DefaultTimeoutStopSec=90s, DefaultRestartSec=100ms in /etc/systemd/system.conf . I want to get a clearance from you, before I restart my computer to check if it works.

    1. I will try booting an old kernel after I test the effect of point 2.
     – Sanjay Sep 24 '17 at 22:22
  • 100 ms is probably too short. I would stay with the 90 s default. – Panther Sep 25 '17 at 01:33

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