f10.x86_64: laptop HP: Problem to see all 4Gb of memory

[Matthew Garrett]

On Wed, Dec 03, 2008 at 12:00:03PM +0100, Dario Lesca wrote:

> Now the BIOS show correctly 4Gb of RAM, but Fedora10 x86_64 show only
> 3Gb of RAM (also smolt show 3Gb of RAM):
> > [root at lesca ~]# free
> >              total       used       free     shared    buffers     cached
> > Mem:       3093172    2771984     321188          0       1712    1549504
> > -/+ buffers/cache:    1220768    1872404
> > Swap:      6291448      93716    6197732

You have a 945 chipset. It can only address 4GB of physical address 
space, and some of that address space has to be used to provide access 
to PCI devices. It's common for a gigabyte or so to be reserved for 
that, which means that you get a maximum of 3GB. You'll need a more 
modern motherboard chipset if you want to support more.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org