f10.x86_64: laptop HP: Problem to see all 4Gb of memory
Matthew Garrett
mjg at redhat.com
Wed Dec 3 13:21:37 UTC 2008
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
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