[ale] New box (happy birthday to me)

Calvin Harrigan charriglists at bellsouth.net
Mon Mar 2 12:32:46 EST 2009


JK wrote:
> I built the 8GB Phenom box I mentioned in the "Virtualization"
> thread, and yeah, it seems to handle the guests a lot more
> smoothly than did the P4 machine I wrote about earlier :-)
> 
> Some flakiness, though, which I've googled about with not much
> luck:
> 
> * The BIOS says "Installed RAM: 8192MB  Usable: 6911 MB".
> Where is 1281MB going?  The Linux kernel also sees only 6911MB.
> 
> * Always at boot the Linux kernel says something like: "You
> have no RAM aperture, please enable IOMMU in the BIOS". However,
> there doesn't seem to be any such BIOS option. (Motherboard is
> an ASUS M3N78, BIOS is Phoenix/Award.)
> 
> * Often at boot time the Linux kernel says "Unable to enumerate
> devices on USB interface 3". When this happens the machine
> usually hangs with a black screen :-(  (And no ctl-alt-f1 console
> joy, either.) If it gets past this point, though, it boots fine
> (into Ubuntu Intrepid AMD64 desktop).
> 
> I'm running without any overclocking; all BIOS settings are
> "standard" or "safe".
> 
> I wonder if I need to RMA this motherboard?
> 
> Thanks,
> 
> -- JK
> 

In some bios there is an option to enable/disable memory hole remapping. 
  Enable the remapping. This usually allows you to get to all of your 
ram. This does have it's limitations however, some drivers most notably 
network and sound drivers don't always work properly.


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