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

Kevin Chadwick ma1l1ists at yahoo.co.uk
Fri Sep 21 09:48:54 EDT 2012

> 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.

Yes on 64 bit systems you will see the maximum memory. On 32 bit you
need a PAE enabled kernel to get any more than 4Gig. If you have less
than 4Gig you may want to use the PAE kernel in any case because if you
have a relatively modern cpu it will support hardware Non execute
protection. On a non-PAE kernel you will see NX protection disabled or
such in dmesg.


'Write programs that do one thing and do it well. Write programs to work
together. Write programs to handle text streams, because that is a
universal interface'

(Doug McIlroy)

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