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Thread: Is it possible to revert back to the prior kernel?

  1. #1
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    Is it possible to revert back to the prior kernel?

    I have a device that is not yet supported in the new kernel and I was wondering if it is possible to revert back to the earlier kernel?

  2. #2
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    Re: Is it possible to revert back to the prior kernel?

    You should have a choice in your Grub menu to use the previous kernal.

  3. #3
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    Re: Is it possible to revert back to the prior kernel?

    If you don't see the previous kernel in your menu.lst, but you haven't uninstalled it, install StartUp-Manager and go to the Advanced tab. Set the "Limit Number of Kernels to Keep" to 2 or more and you should see the older kernels. You can also set the default kernel on the Boot Options tab.

    For information on StartupManager, how to install, tips, etc. click on the "SUM" link in my signature line.
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  4. #4
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    Re: Is it possible to revert back to the prior kernel?

    Unless it was a minor upgrade to linux:

    vmlinuz-2.6.28-11-generic

    This could refer to any version of 2.6.28-11 (which I'm currently running 2.6.28.11.15).

    You can boot into any kernel that exists in /boot

    ls /boot/vmlinuz*

    If you can't find an earlier kernel in the repositories, you may be able to simply copy it from the Live CD. You will have to remake your initrd.img using dpkg-reconfigure.
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  5. #5
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    Re: Is it possible to revert back to the prior kernel?

    Quote Originally Posted by tgalati4 View Post
    Unless it was a minor upgrade to linux:

    vmlinuz-2.6.28-11-generic

    This could refer to any version of 2.6.28-11 (which I'm currently running 2.6.28.11.15).

    You can boot into any kernel that exists in /boot

    ls /boot/vmlinuz*

    If you can't find an earlier kernel in the repositories, you may be able to simply copy it from the Live CD. You will have to remake your initrd.img using dpkg-reconfigure.
    The kernals that have been installed so far in Jaunty are 2.6.28-11, 2.6.28-13, 2.6.28-14, and 2.6.28-15

  6. #6
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    Re: Is it possible to revert back to the prior kernel?

    Jaunty shipped with 2.6.28.11.15 and now 2.6.25.15.20 is currently available. I don't know how you can load the intermediate kernels if you didn't upgrade them previously.
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  7. #7
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    Re: Is it possible to revert back to the prior kernel?

    Quote Originally Posted by tgalati4 View Post
    Jaunty shipped with 2.6.28.11.15 and now 2.6.25.15.20 is currently available. I don't know how you can load the intermediate kernels if you didn't upgrade them previously.
    You can just go into synaptic and select the "linux-image-2.6.28-XX" kernel you wish. Also install the associated linux-header. The kernels will be installed but not put in use unless you change your menu.lst.

    To update the menu.lst, run "sudo update-grub", which should then display the additional kernel(s) in the menu.
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