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SubjectRe: Hardware Problem - Asus A8N-VM CSM
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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