[K12OSN] Can not get 4 GB memory

Nadav Kavalerchik nadavkav at gmail.com
Tue Sep 4 18:46:02 UTC 2007

we had several boards with the same issue :-(

try the PAE kernel to see if it makes any difference,
i think it emulates some extra address space for 32bit kernel.

On 9/4/07, "Terrell Prudé Jr." <microman at cmosnetworks.com> wrote:
>  Jim Kronebusch wrote:
> On Tue, 4 Sep 2007 18:00:19 +0800, Jean Phil wrote
>  I have installed k12ltsp 6.0 64bit on a Pentium D with 4 GB of memory. But
> according to the system monitor I have only 3.2 GB memory. How can I get all
> 4 GB ram?
>  3.2 GB almost certainly indicates you are running a 32-bit kernel.  Try installing the
> server kernel and see if that helps.
> Another possibility is that the computer is saddled with a 32-bit
> motherboard chipset.  Anything with, as just one example, an Intel i945
> chipset will have this problem.  I have a laptop affected by this.  The CPU
> is an Intel Core 2 Duo 64-bit, the kernel is 64-bit (Ubuntu Feisty x86-64),
> but the chipset has space for only 2^32 memory addresses.  If that's what's
> going on, then that means that, no matter *what* you do, the PCI addressing
> will suck up your top-end address space, 64-bit kernel or not, due to the
> chipset's hardware limitation.  In my Latitude D620, the BIOS shows two 2GB
> sticks installed, but only 3.25GB available for use.  I spent five hours
> on the phone with Dell before I finally got them to admit this (the i965
> fixes that problem--it addresses 2^33 bytes, or 8GB).
> Check out your chipset and see which one it is.  "lspci" should be quite
> helpful in that regard.
> --TP
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