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Memory upgrade not detected
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  1. #1
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    Memory upgrade not detected

    I am running Fedora 14 64 bits on a Thinkpad 510:

    2.6.35.6-45.fc14.x86_64 #1 SMP Mon Oct 18 23:57:44 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux

    I installed 6 GB of ram. My bios is detecting the 6GB but my OS is only using 2.9GB.


    cat /proc/meminfo:
    MemTotal: 3013448 kB
    MemFree: 64704 kB
    Buffers: 10516 kB
    Cached: 438716 kB
    SwapCached: 127460 kB
    Active: 2033756 kB

    Top:
    Mem: 3013448k total, 2951100k used, 62348k free, 11128k buffers
    Swap: 5111804k total, 653136k used, 4458668k free, 437464k cached

    The kernel is likely not detecting all the memory. Is there a workaround/patch available for this issue?

    Thanks!

  2. #2
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    Re: Memory upgrade not detected

    As you are using the 64 bit kernel the memory should be recognised. It is usually a bios issue when it isn't detected but as you say you have checked that I'm not sure what to recommend. However I notice you are using an old kernel so would suggest you do a full update first, maybe some bug has been fixed. Long shot but worth updating anyway.

  3. #3
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    Re: Memory upgrade not detected

    Did you run memtest and if yes, what size is memtest reporting. If you didn't run it yet, I would strongly recommend to do so, since your RAM may not be functioning correctly.

  4. #4
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    Re: Memory upgrade not detected

    Thx for the answer.
    I didn't run memtest. Haven't found a correct set of instructions how to do that. (Installed memtest64, ran memtest-setup then what ?)

    I haven't done a kernel update yet. I thought Fedora 14 64bits out of the box would support 6GB. I previously ran Fedora 13 32 Bits with 4GB of ram without issue and that was much faster than my current 64bits, annoying.

    ---------- Post added at 07:44 PM ---------- Previous post was at 01:18 PM ----------

    updated kernel to latest:
    2.6.35.10-74.fc14.x86_64 #1 SMP Thu Dec 23 16:04:50 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux

    memory problem is still present.

  5. #5
    unixrobot Guest

    Re: Memory upgrade not detected

    Hi,

    can you please check whether you have built in your memory upgrade as suggested by Lenovo?

    http://www-307.ibm.com/pc/support/si...cid=MIGR-75886

    and do you use the latest BIOS release and please post your dmesg?

  6. #6
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    Re: Memory upgrade not detected

    Finally got the bottom of it! I ran memtest and it could only recognize 2.9GB, with 2 x 2GB ram or one single 4GB ram. That pushed me to check the BIOS. I did a BIOS update and I have now full access to my 6GB or ram.

    Thank you all.

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