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Thread: How to boot into an older kernel on Mac iBook G4

  1. #1
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    How to boot into an older kernel on Mac iBook G4

    Anyone know how to boot into an older kernel on a Mac iBook G4?


    I know I have 2 kernels installed, but there is no menu to choose boot options from as I only have one OS installed (Ubuntu).


    Thank you.

  2. #2
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    Re: How to boot into an older kernel on Mac iBook G4

    You should still be able to get to the menu list at boot. Try hitting escape or shift at boot or just after.

  3. #3
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    Re: How to boot into an older kernel on Mac iBook G4

    Thanks for your reply. Unfortunately neither esc or shift produced the menu. I tried with each, pressing them intermittently from when I powered on until the log in screen appeared. The only effect was when pressing esc I got a "quiet boot" (no splash).

  4. #4
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    Re: How to boot into an older kernel on Mac iBook G4

    How old are the kernels? Which release, if you remember?

    Depending, boot to Ubuntu, open a terminal and:

    Code:
    sudo nano /etc/default/grub
    Find these lines and make them look like this:

    Code:
    GRUB_DEFAULT=0
    GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=true
    GRUB_TIMEOUT=10
    Reboot. Anything?

  5. #5
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    Re: How to boot into an older kernel on Mac iBook G4

    Kernel versions 3.11.0-3 and 3.11.0-4 for powerpc.

    There is no /etc/default/grub file.

    I guess I should install grub, right? How?

    Thanks.

  6. #6
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    Re: How to boot into an older kernel on Mac iBook G4

    Hello,
    Maybe you have a old version of grub.
    Try to edit file menu.lst :
    sudo gedit /boot/grub/menu.lst

    If it is ok you modifie :

    ## timeout sec
    # Set a timeout, in SEC seconds, before automatically booting the default entry
    # (normally the first entry defined).
    timeout X



    ## hiddenmenu
    # Hides the menu by default (press ESC to see the menu)
    hiddenmenu
    By :
    ## timeout sec
    # Set a timeout, in SEC seconds, before automatically booting the default entry
    # (normally the first entry defined).
    timeout 10


    ## hiddenmenu
    # Hides the menu by default (press ESC to see the menu)
    ## hiddenmenu
    You save and do a :
    sudo update-grub

    Bye

  7. #7
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    Re: How to boot into an older kernel on Mac iBook G4

    With a kernel that recent don't think old grub, but definitely worth a try, just in case.

    Do you also have a Mac OS on this machine? That could be using Boot Camp to boot and not grub, but you should still be able to find the /grub config file in Ubuntu in one of the two places given so far.

  8. #8
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    Re: How to boot into an older kernel on Mac iBook G4

    Hmm...

    No /boot/grub directory either...

    No Mac OS or any other OS installed, only Ubuntu.

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