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Accepted
Muaad ElSharif
Asked: 2017-02-27 01:34:45 +0800 CST

Kubuntu 16.04.1 boots slowly

  • 772

I have been using Kubuntu 16.04.1 for almost a month, so far so good, but the boot is very slow, I was using Ubuntu Gnome before it and it booted in 5 seconds, Kubuntu takes a minute and a half just loading the Kubuntu logo, And nothing else is installed alongside Kubuntu.

Any idea how to fix this? I have an SSD by the way.

Output of systemd-analyze blame: 

       680ms dev-sda1.device
       670ms apt-daily.service
       491ms grub-common.service
       487ms accounts-daemon.service
       459ms NetworkManager.service
       154ms ondemand.service
       151ms systemd-udev-trigger.service
       140ms ModemManager.service
       138ms gpu-manager.service
       129ms upower.service
       126ms apparmor.service
       118ms networking.service
       109ms thermald.service
       108ms console-setup.service
       107ms systemd-logind.service
       103ms irqbalance.service
        83ms apport.service
        80ms keyboard-setup.service
        61ms udisks2.service
        53ms alsa-restore.service
        48ms rsyslog.service
        47ms pppd-dns.service
        41ms systemd-journald.service
        38ms snapd.autoimport.service
        35ms systemd-user-sessions.service
        34ms avahi-daemon.service
        34ms systemd-tmpfiles-setup.service
        34ms plymouth-start.service
        32ms systemd-rfkill.service
        31ms plymouth-quit.service
        31ms systemd-journal-flush.service
        28ms plymouth-read-write.service
        25ms [email protected]
        24ms resolvconf.service

lines 1-34

systemd-analyze critical-chain output: 

graphical.target @1min 30.518s └─multi-user.target @1min 30.493s   └─getty.target @1min 30.459s
    └─[email protected] @1min 30.459s
      └─rc-local.service @1min 30.453s +1ms
        └─network.target @1min 30.433s
          └─wpa_supplicant.service @1min 30.625s +28ms
            └─basic.target @1min 30.197s
              └─sockets.target @1min 30.197s
                └─snapd.socket @1min 30.195s +1ms
                  └─sysinit.target @1min 30.194s
                    └─systemd-backlight@backlight:intel_backlight.service >@525ms +2ms
                      └─system-systemd\x2dbacklight.slice @511ms
                        └─system.slice @126ms    
                   └─-.slice @125ms
boot

3 Answers

  1. Well, Kubuntu is the slowest ubuntu-based distro.

    If you want to make it faster, try to:

    • install e4rat (not recommended if you use an SSD);
    • Disable useless services. I may suggest you to disable network manager, the splash screen (How to disable Plymouth), wpa_supplicant, your display manager (KDM) - just use TTY;
    • Remove bloatware packages (packages you never use but are preinstalled)

    ... or just install Xubuntu / Lubuntu.

    • 2

  2. You didn´t said where Kubuntu is installed - on your laptop, notebook... and nothing said about performance.

    Anyway, try to change default boot time. To do this, open your terminal and run:

    gksudo kate /etc/default/grub

    You will see GRUB_TIMEOUT=10 - by default is 10 second, but you can change it with 3 etc.

    Then you need to apply changes using command sudo update-grub. After that reboot your system.

    Also, if you´re not familiar with terminal or just want to do this easier, you can use Grub Customizer

    • 2
  3. Best Answer

    While all of your input was helpful (and I thank you for that), no one was actually able to "fix" the issue for me, the computer took 1 minute 48 seconds to boot and that's a lot even for windows installed on a 5400 rpm HDD!).

    Now let's get to the juicy stuff:

    At first I went to my BIOS and changed the Sata mode from AHCI to Compatible, Ubuntu gnome wouldn't load unless the controller was AHCI.

    And disabled Intel Virtualization Technology because I no longer use VirtualBox.

    Then I edited the /etc/fstab because I deleted the swap that came with Kubuntu and it was still mentioned there (totally forgot to mention it in the question, sorry! (The BLKID was matching and I matched it after deleting swap)

    It was like this:

    /etc/fstab: static file system information.

    #

    Use 'blkid' to print the universally unique identifier for a

    device; this may be used with UUID= as a more robust way to name devices

    that works even if disks are added and removed. See fstab(5).

    #

    / was on /dev/sda1 during installation UUID=4840d72b-2435-4dc1-9227-ab7671fd3d93 / ext4

    errors=remount-ro 0 1

    swap was on /dev/sda5 during installation UUID=0023c124-ea85-41d2-834c-83f6877d6959 none swap sw

    0 0

    And simply became this

    /etc/fstab: static file system information.

    #

    Use 'blkid' to print the universally unique identifier for a

    device; this may be used with UUID= as a more robust way to name devices

    that works even if disks are added and removed. See fstab(5).

    #

    / was on /dev/sda1 during installation UUID=4840d72b-2435-4dc1-9227-ab7671fd3d93 / ext4

    errors=remount-ro 0 1

    Then I went to /etc/systemd/system.conf and removed the comment from

    DefaultTimeoutStartSec=90s

    DefaultTimeoutStopSec=90s

    via the command sudo kate /etc/systemd/system.conf

    which was set to 90 seconds by default!! And set it to one second!

    DefaultTimeoutStartSec=1s DefaultTimeoutStopSec=1s

    Finally, I went to grub via sudo kate /etc/default/grub and added raid=noautodetect to GRUB_CMDLINE_LINUX_DEFAULT to become:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash raid=noautodetect"

    Then sudo update grub 2 sudo update grub

    Boot time is now 19 seconds.

    I've also updated the kernel to 4.10, which didn't affect the boot time but thought it would be helpful to mention.

    • 0