On 30/06/2013 10:23, Jack Mitchell wrote:
> I recently bought a new AMD FM2 motherboard[1] and coupled it with an
> AMD A4 APU. I put 2x2GB sticks of RAM in the board, and the UEFI bios
> detects both sticks and reports 4GB. Now, when I boot into a fresh
> install of Linux [2] only 1501MB is reported as available.
>
> I was told this may be an ACPI problem, I have updated the motherboard
> to the latest BIOS revision which works. Could anyone shed any light on
> this, or where I should make a start in helping to debug the problem?
>
> Kind Regards,
> Jack.
>
> [1] http://www.gigabyte.com/products/product-page.aspx?pid=4383&dl=#ov
> [2] Linux mediaserver 3.9.7-1-ARCH #1 SMP PREEMPT Thu Jun 20 22:45:32
> CEST 2013 x86_64 GNU/Linux
>
>

I have attached the dmidecode output in case that is of any help; I can 
see that it is only registering one bank of RAM, so detection of RAM 
seems to be the issue; but I don't know what is causing it.

I have also attached a dmesg.

Cheers,
Jack.

-- 

   Jack Mitchell (jack@embed.me.uk)
   Embedded Systems Engineer
   http://www.embed.me.uk

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