Re: Hardware Problem - Asus A8N-VM CSM

[Bill Davidsen <davidsen@tmr.com>]

Marc Perkel wrote:
> Langsdorf, Mark wrote:
> > > > The problem. 2 out of the 4 sees all 4 gigs of ram. The other 2 see 
> > > > only 2.8 gigs of ram. And it's hardware related because in the bios 
> > > > setup the ones that show 2.8 show it in the bios.
> > > >
> > > > The motherboards were not prchased at the same time. All have 
> > > > different brands of ram. And the processors are different. The 2 
> > > > that don't see all the ram are the newest ones.
> > > >
> > > > I tried swapping ram between one that saw 2.8 gigs and one that saw 
> > > > 4 gigs and the problem stays with the motherboard.
> > > > I haven't yet swapped out the processors.
> > > >
> > > > So - I'm a little stumped. Can someone point me in the right direction?
> > > >       
> >
> > Usually, missing memory comes from the PCI I/O hole, or the
> > IOMMU/AGP/framebuffer overlays.  Does your BIOS have an
> > options for creating a memory hole or hoisting memory?  If
> > so, are the settings between the 4G machines different from
> > the 2.8G machines?
> >
> > Also, do you have an IOMMU aperture enabled and if so, how
> > large?
> >
> > Are there any hardware differences between the systems, like
> > different AGP or PCI graphics cards?
> >
> >  
> > > Answering my own question perhaps. Could it be related to whether or 
> > > not the processor is a "revision e" chip?
> > >     
> >
> > Possibly, but I'd expect the RevE parts to see more DRAM than
> > the earlier parts.
> >
> >
> >   
>
> I fixed the problem. It wasn't a Revision E issue after all. I just 
> pulled the battery and when it came up clean it saw all the memory. 
> Thanks for your help.
Would have been interesting to use the "reset to factory defaults" 
option, just to see if some bit isn't set to known state doing that.

--
Bill Davidsen <davidsen@tmr.com>
  Obscure bug of 2004: BASH BUFFER OVERFLOW - if bash is being run by a
normal user and is setuid root, with the "vi" line edit mode selected,
and the character set is "big5," an off-by-one errors occurs during
wildcard (glob) expansion.
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