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Thread: How do I downgrade kernel on 12.10?

  1. #1
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    How do I downgrade kernel on 12.10?

    I did a fresh installation of Ubuntun 12.10 (64 bit, US English) on my computer after downloading the ISO from Ubuntu.com. It comes with kernel version 3.5.0.21-generic

    In order for one of my installed programs to work, I would like to downgrade the current kernel version to 3.2.0.24-generic

    I surfed to packages.ubuntu.com/precise/kernel and found the following: linux-image-3.2.0.24-generic

    Questions:

    1. The current version of my installed kernel is 32 bit or 64 bit?

    2. linux-image-3.2.0.24-generic is a 32 bit or 64 bit kernel? (Please bear in mind that I installed the 64 bit edition of Ubuntu 12.10)

    3. If linux-image-3.2.0.24-generic is a 32 bit kernel, where can I find the 64 bit one?

    4. Is it advisable to downgrade my current kernel version to an older one?

    5. Could someone provide detailed instructions as to what specific commands I must issue at the terminal window?

    Thanks in advance for your help.

  2. #2
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    Re: How do I downgrade kernel on 12.10?

    If you want that particular kernel, do a clean installation of Ubuntu 12.04 LTS. Because Ubuntu 12.10 is not designed for that kernel.

    How-to: https://sites.google.com/site/easyli...reinstallation
    Last edited by Pjotr123; December 27th, 2012 at 10:59 PM.
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  3. #3
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    Re: How do I downgrade kernel on 12.10?

    Quote Originally Posted by Pjotr123 View Post
    If you want that particular kernel, do a clean installation of Ubuntu 12.04 LTS. Because Ubuntu 12.10 is not designed for that kernel.
    Thanks, my friend, for your advice.

    But on the official website, the version available for download is 12.04.1 LTS with a kernel version higher than 3.2.0.24.

    I don't mind installing 12.04.1 LTS but it comes with a higher kernel version number.

    What shall I do?

  4. #4
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    Re: How do I downgrade kernel on 12.10?

    The point release of 12.04 LTS (12.04.1) has indeed a higher minor kernel number, but it's only minor. Therefore it'll probably do exactly the same for you as the lower minor number that you seek.

    Minor kernel updates typically only contain bug fixes, not feature changes.
    Last edited by Pjotr123; December 27th, 2012 at 11:48 PM.
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  5. #5
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    Re: How do I downgrade kernel on 12.10?

    Quote Originally Posted by Pjotr123 View Post
    The point release of 12.04 LTS (12.04.1) has indeed a higher minor kernel number, but it's only minor. Therefore it'll probably do exactly the same for you as the lower minor number that you seek.

    Minor kernel updates typically only contain bug fixes, not feature changes.
    Hi friend,

    Ubuntu 12.04.1 has a kernel version of 3.2.0-35.40 while the version that I need is 3.2.0.24.38

    Is it considered a minor kernel update?

  6. #6
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    Re: How do I downgrade kernel on 12.10?

    just a minor update/patch
    before you reinstall give 3.7 a try it is in the xorg edgers ppa
    https://launchpad.net/~xorg-edgers/+archive/ppa
    Code:
    sudo apt-add-repository ppa:xorg-edgers/ppa;sudo pat-get update;sudo apt-get install linux
    if you don't want the beta drivers there, just disable the source is your software sources
    Code:
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  7. #7
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    Re: How do I downgrade kernel on 12.10?

    Quote Originally Posted by regency View Post
    Hi friend,

    Ubuntu 12.04.1 has a kernel version of 3.2.0-35.40 while the version that I need is 3.2.0.24.38

    Is it considered a minor kernel update?
    Yes.
    Tips, tweaks and how-to's for Ubuntu and Mint:
    http://sites.google.com/site/easylinuxtipsproject
    In for a pleasant surprise? Give Xubuntu a try:
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  8. #8
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    Re: How do I downgrade kernel on 12.10?

    Quote Originally Posted by regency View Post
    In order for one of my installed programs to work, I would like to downgrade the current kernel version to 3.2.0.24-generic
    Just as a matter of interest, what program is it?
    Michael

  9. #9
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    Re: How do I downgrade kernel on 12.10?

    Do not take me for an expert, but I think that what we see here kernel version 3.2.0-35.40 and version 3.2.0-24.38 are examples of the numbering system used by Ubuntu maintainers when they patch the kernel with security updates and bug fixes. doing this helps them trace back and and find the code that might have introduced new problems or even brought back old ones.

    If we look here

    http://kernel.org/

    we see that the Linux developers use a slightly different numbering system and that Ubuntu 12.04 does not have the very latest kernel of 3.2.35.

    If we go to the FAQ page we see this

    http://kernel.org/faq/#distrokernel

    Q. Where can I find kernel 2.4.20-3.16?

    A. Kernel version numbers of this form are distribution kernels, meaning they are modified kernels produced by distributions.
    so, 3.2.0-35.40 and 3.2.0-24.38 are both Linux kernels of the 3.2.0 series that have been modified slightly by the Ubuntu maintainers.

    Regards.
    It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
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  10. #10
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    Re: How do I downgrade kernel on 12.10?

    Quote Originally Posted by regency View Post
    I did a fresh installation of Ubuntun 12.10 (64 bit, US English) on my computer after downloading the ISO from Ubuntu.com. It comes with kernel version 3.5.0.21-generic

    In order for one of my installed programs to work, I would like to downgrade the current kernel version to 3.2.0.24-generic

    I surfed to packages.ubuntu.com/precise/kernel and found the following: linux-image-3.2.0.24-generic

    Questions:

    1. The current version of my installed kernel is 32 bit or 64 bit?

    2. linux-image-3.2.0.24-generic is a 32 bit or 64 bit kernel? (Please bear in mind that I installed the 64 bit edition of Ubuntu 12.10)

    3. If linux-image-3.2.0.24-generic is a 32 bit kernel, where can I find the 64 bit one?

    4. Is it advisable to downgrade my current kernel version to an older one?

    5. Could someone provide detailed instructions as to what specific commands I must issue at the terminal window?

    Thanks in advance for your help.
    Honestly it's probably better just to downgrade your whole system to 12.04. You've got long term support that way. Any features that you're missing you could probably install manually yourself - and certainly that would be easier than trying to mess around with the kernel. You should be able to choose between the 64bit/32bit when you download the .iso image.

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