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Thread: Ref prev thrd: [SOLVED] This kernel does not support a non-PAE CPU

  1. #1
    Join Date
    Oct 2012
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    Ref prev thrd: [SOLVED] This kernel does not support a non-PAE CPU

    lukeiamyourfather said: "Alternatively you could stick with 12.04 LTS until April of 2017."

    The last two 12.04 updates that I received were pae.

    Note the computer is 64-bit (only 2G memory), but I want to run 32-bit linux.

    So am I stuck at 3.2.0-30?

    If so, it that seems like a really big change for a LTS version with 4.5 yrs left to go.

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

    Re: Ref prev thrd: [SOLVED] This kernel does not support a non-PAE CPU

    Welcome to the forums.

    If your computer is 64bit it also is PAE. Only some older Intel chips were not PAE. So only if you have an old computer will the standard new PAE 32 bit version not work.

    http://en.wikipedia.org/wiki/Physical_Address_Extension
    PAE is provided by Intel Pentium Pro and above CPUs, including all later Pentium-series processors (except most 400 MHz-bus versions of the Pentium M)
    http://ubuntuforums.org/showthread.php?t=1951653
    Ubuntu, Kubuntu, and probably Edubuntu will ship with the PAE kernel in 12.04, but both Lubuntu and Xubuntu will ship with non-pae

    How To Install Ubuntu 12.04 On Non-PAE Capable Hardware.
    http://www.webupd8.org/2012/05/how-t...-pae.html#more
    To see processor
    lscpu
    grep --color=always -i PAE /proc/cpuinfo


    Linus does not like PAE or 32 bit.
    http://cl4ssic4l.wordpress.com/2011/...lds-about-pae/
    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
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    Re: Ref prev thrd: [SOLVED] This kernel does not support a non-PAE CPU

    Thanx for the welcome. Hope I don't wear it out

    My bad for the poor description of the problem. I installed the 32-bit version of lubuntu 12.04 on a year old 64-bit computer using wubi. Kernel updates thru 3.2.0-30 were not pae, and all was good. Then, the last 2 kernel updates resulted in pae kernels, and the computer doesn't boot with either of them. The screen remains totally blank. As far as I know, I didn't "do anything" that would cause the updates to change to being pae.

    The computer still operates normally when booted with the -30 kernel, so I would like to know if there is a way for me to get non pae kernel updates for kernels after -30. Otherwise I'll try to delete the pae kernels and then, pin -30. I saw a comment about compiling my own kernel, but that's more than I want to do right now.

  4. #4
    Join Date
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    Ubuntu 14.04 Trusty Tahr

    Re: Ref prev thrd: [SOLVED] This kernel does not support a non-PAE CPU

    If computer is only a year or two old then PAE should not be the issue. It may be something that happened at the same time.

    But I do not know details of wubi as it just runs inside a file inside a NTFS partition and is not a full partitioned install.
    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.







  5. #5
    Join Date
    Oct 2012
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    Re: Ref prev thrd: [SOLVED] This kernel does not support a non-PAE CPU

    I'm pretty sure you are right about it being something else. I removed all the pae files and installed the non pae versions. The computer still didn't boot, so my guess is that there was some change included in the -31 update that is causing the prob. That doesn't really explain why I started to get pae updates though.

    I've pinned -30 and things are good again. Thanks for the feedback.

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