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Thread: Not seeing all Installed Memory

  1. #1
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    Not seeing all Installed Memory

    I'm running the live cd of 10.06LTS 64Bit AMD and its working great on my HP DV6810us. I ahve 4GB ram installed in this laptop but Ubuntu is only seeing 3.6GB of the ram and using 486mb of it.

    So my questions are, Why doesn't it see the full 4 gigs? AND How much ram does Ubuntu support?

  2. #2
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    Re: Not seeing all Installed Memory

    I don't know how much Ubuntu supports, but the Ubuntu live CD is 64 bit, and 64 bit OSes support over 16GB. Is the 3.6GB free memory or total?
    Last edited by corrytonapple; July 6th, 2010 at 06:28 PM.
    --Corrytonapple----
    [Toshiba L455-S5008] [Intel Pentium 2.4GHz Procesor]
    [250GB HDD;4GB RAM] [Debian Wheezy 7.0 with GNOME 3][Fedora 16]

  3. #3
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    Re: Not seeing all Installed Memory

    If you go to Applications > Accessories > Terminal on the LiveCD and type this in:

    Code:
    free -m
    what do you get?

  4. #4
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    Re: Not seeing all Installed Memory

    Its probably seeing 3.6GB because the other 0.4GB is being 'shared' to the video card (no dedicatied video memory means it has to use the main system RAM)

    To be honest, I have no idea of the maximum RAM supported by linux distros, but it would have to be at least 16GB, and I would guess 64GB+.

  5. #5
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    Re: Not seeing all Installed Memory

    Quote Originally Posted by cascade9 View Post
    Its probably seeing 3.6GB because the other 0.4GB is being 'shared' to the video card (no dedicatied video memory means it has to use the main system RAM)

    To be honest, I have no idea of the maximum RAM supported by linux distros, but it would have to be at least 16GB, and I would guess 64GB+.
    Nice answer; I like it!

    As an aside; how would one check to see if that is the case?

  6. #6
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    Re: Not seeing all Installed Memory

    Ok, silly me!

    Code:
    cat /proc/meminfo
    This is the way to go; much more complete information there.

  7. #7
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    Re: Not seeing all Installed Memory

    I did the command in the terminal and it looks to show 3.8gb regnised. I have 128 shared to video, the max that the bios will allow. So its all found and used.

  8. #8
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    Re: Not seeing all Installed Memory

    Quote Originally Posted by Rubi1200 View Post
    Nice answer; I like it!

    As an aside; how would one check to see if that is the case?
    You will be limited by the motherboard and $$ before you are limited by the kernel

    http://lkml.indiana.edu/hypermail/li...2.2/00292.html
    There are two mistakes one can make along the road to truth...not going all the way, and not starting.
    --Prince Gautama Siddharta

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  9. #9
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    Re: Not seeing all Installed Memory

    Quote Originally Posted by Jim2029 View Post
    I did the command in the terminal and it looks to show 3.8gb regnised. I have 128 shared to video, the max that the bios will allow. So its all found and used.
    Odd, according to HP, up to 1071MB can be alocated to video RAM-

    Video MemoryUp to 1071 MB
    http://h10025.www1.hp.com/ewfrf/wc/d...roduct=3686683

    Quote Originally Posted by bodhi.zazen View Post
    You will be limited by the motherboard and $$ before you are limited by the kernel

    http://lkml.indiana.edu/hypermail/li...2.2/00292.html
    16TB- Ohh well, I got the 16 part right at least

  10. #10
    pricetech is offline Iced Blended Vanilla Crème Ubuntu
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    Re: Not seeing all Installed Memory

    How much RAM is enough ?? More than you currently have. This rule applies to everyone I know at least.

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