[arch-general] Can't see all my memory

[Guillermo Leira]

> -----Mensaje original-----
> De: arch-general [mailto:arch-general-bounces at archlinux.org] En nombre de Ralf
> Mardorf
> Enviado el: viernes, 21 de septiembre de 2012 14:49
> Para: General Discussion about Arch Linux
> Asunto: Re: [arch-general] Can't see all my memory
> 
> On Fri, 2012-09-21 at 16:17 +0530, Aurko Roy wrote:
> > On Fri, Sep 21, 2012 at 4:16 PM, Roel Deckers <r.deckers.93 at gmail.com>wrote:
> >
> > > Does the missing memory show up in other OSs?
> > > It can be faulty ram if it doesn't show up in any OS, recently had that
> > > problem.
> > >
> > > On Fri, Sep 21, 2012 at 12:37 PM, Guillermo Leira <gleira at gleira.com>
> > > wrote:
> > > > Hello!
> > > >
> > > > I've installed an x86_64 Arch on a PC with 8 GB, but it seems to be
> > > seeing
> > > > just four. What have I done wrong?
> > > >
> > > > Bios sees 4 x 2GB Modules and reports 8 GB, but top or free report only
> 4
> > > > GB.

> > You could try running memtest86+ on boot and see if it detects the
> > additional memory.
> 
> I never heard that anybody solved this issue, but I read that many
> people have this issue too.
> 
> On my computer there are only 3 GB + 768 MB of 4 MB available. The
> graphics has got it's own framebuffer, 256 MB, but IIRC I once have seen
> that the framebuffer is 512 MB. I guess I can see it running NVIDIA
> settings, but at the moment I can't run it, because I'm using the nv
> driver. IIRC memtest86+ did always show the complete memory on my
> machine. I don't care, since it doesn't make a difference if I got 4GB
> or 3.8GB. However, I read often about this 8GB issue, for different
> distros. And it where definitive threads about 64-bit architecture, not
> about 32-bit and PAE issues.
> 
> Regards,
> Ralf

Well... Solved. It is a new motherboard, and it has a setting (that I've never seen in any other one) that says "Memory Remap Feature". I don't understand that a motherboard has a default option that actually should appear as "Waste half of your memory".

Thanks to all. :-)

Guillermo Leira