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Thread: Very slow booting - please assist

  1. #1
    Join Date
    Jun 2011
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    20

    Very slow booting - please assist

    I installed ubuntu on my system when I bought it, around one year ago.

    I installed 11.10, then upgraded to 12.04 and 12.10.

    Over the last year my system boot time has deteriorated a lot, to the point that it led me to look into it.

    So I installed bootchart and bootchart GUI to see if I can find any clues.

    Sadly, I have no skill in understanding the output chart, so I am posting it here in case someone might help me.

    http://anpel.dimiourgiasite.gr/ubuntu-quantal.png

    The rest of the files generated is here:

    http://anpel.dimiourgiasite.gr/ubuntu-quantal.tgz

    Please let me know if there is anything I can do to make my system boot faster, or if I should just accept it and go on.

  2. #2
    Join Date
    Jun 2009
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    Chicago Suburbs
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    Ubuntu 14.04 Trusty Tahr

    Re: Very slow booting - please assist

    I never learned to read boot charts.

    But I do look at log files. Specifically dmesg and errors, long times between entries, or repeated attempts at loading and either fail or sometimes working.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #3
    Join Date
    Sep 2012
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    Re: Very slow booting - please assist

    How much time are you talking about? Since I installed 12.04 in September, start up has gone from something like 20 seconds to maybe 90. I assumed that was normal as I have added more programs, files and such.

  4. #4
    Join Date
    Jun 2011
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    Re: Very slow booting - please assist

    90 seconds seems to be close to what I'm getting, and 20 seconds is pretty close to what I was initially getting.

    If that is just the extra load I've put on my system over time, I can compromise with it.

    But if something is wrong and I can fix it, why not ask?

    Hibernate does not work on my system (don't know if I can fix it, tried a few workarounds with no luck) so I have to shut down every time I leave my workstation.

    So 90 seconds bugs me, and changing it would make me happier with my system.

  5. #5
    Join Date
    Jun 2011
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    Re: Very slow booting - please assist

    Looks like I found something..

    In dmesg there seem to be some big time differences between log entries.

    One of them is about 35 seconds.

    Here is my dmsg output.

    Look what happens after exactly 2 seconds, 2.003964 to be exact.

    http://anpel.dimiourgiasite.gr/dmesg

    Any ideas?

  6. #6
    Join Date
    Aug 2011
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    Xubuntu 14.04 Trusty Tahr

    Re: Very slow booting - please assist

    It can increase a bit when it has to start more things at boot, but quadrupling sounds excessive. It's not what I see in my computer that has been running Ubuntu for six years without reinstalling. Have a look at the log files, especially dmesg, as oldfred suggested. You can find them in /var/log.

    PS: I see you just did that.

  7. #7
    Join Date
    Dec 2012
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    15

    Re: Very slow booting - please assist

    I have a boot time of around 70-80 seconds on 12.04, 90 seconds doesn't seem much longer.


    However, if you have the option, use all cores (multicore systems only, obviously ) during startup:

    Code:
    sudo gedit /etc/init.d/rc
    Find the line that reads CONCURRENCY=none and replace it with CONCURRENCY=makefile

  8. #8
    Join Date
    Jun 2011
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    20

    Re: Very slow booting - please assist

    Quote Originally Posted by Impavidus View Post
    It can increase a bit when it has to start more things at boot, but quadrupling sounds excessive. It's not what I see in my computer that has been running Ubuntu for six years without reinstalling. Have a look at the log files, especially dmesg, as oldfred suggested. You can find them in /var/log.

    PS: I see you just did that.
    Yes I did, and it looks like there is something to fix, as the system remains idle for 35 seconds for some reason.

    Can you point me to where should I start looking?

  9. #9
    Join Date
    Nov 2007
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    Wisconsin
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    Re: Very slow booting - please assist

    The first thing I see on that bootchart, line 9 and taking about 18s, is mount.ntfs. That's an unusually long time to mount a drive.

    - Are you really running from an NTFS hard drive? That's not recommended.
    - Have you booted into windows and defragged it? Is it almost full?
    - Or if you are using an ext* format, how full is it?

    Take a look at the second graph line - disk throughput and disk utilization. See how utilization (the shaded area) is very high, but throughput (the green line) is very low and wiggles around a lot? That's unusual - Ubuntu uses a program called ureadahead to make the green line rather constant and load the system faster.

    - That's another clue that your drive might need to be defragmented.

    See the vertical dashed line around 45s? That's the point where the command-line system is complete. After that it's starting lightdm (the login screen) and the windowing system and Unity.

  10. #10
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Ubuntu 14.04 Trusty Tahr

    Re: Very slow booting - please assist

    I noticed just mounting NTFS partitions changed my boot time from 20 sec to 25 sec with an SSD.
    But I have had issues where my XP would boot but Linux would not see the NTFS partition. After running chkdsk XP booted a bit faster and then Linux mounted it without issue. I might try chkdsk on all NTFS partitions.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







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