Re: 2.6.24.4-64 x86_64 ... New IOMMU Error Message

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On Thu, 2008-04-03 at 12:38 +0300, Antti J. Huhtala wrote:
> ke, 2008-04-02 kello 21:00 -0700, Sean Bruno kirjoitti:
> > I seem to remember this error message a long time ago on my dual
> > opteron, but then it went away.  Now it has reappeared with the latest
> > kernel update:
> > 
> > Checking aperture...
> > CPU 0: aperture @ c000000 size 32 MB
> > Aperture too small (32 MB)
> > No AGP bridge found
> > Your BIOS doesn't leave a aperture memory hole
> > Please enable the IOMMU option in the BIOS setup
> > This costs you 64 MB of RAM
> > Mapping aperture over 65536 KB of RAM @ c000000
> > Memory: 6129976k/7340032k available (2491k kernel code, 161028k
> > reserved, 1390k data, 332k init)
> > SLUB: Genslabs=12, HWalign=64, Order=0-1, MinObjects=4, CPUs=4, Nodes=2
> > Calibrating delay using timer specific routine.. 4021.83 BogoMIPS
> > (lpj=2010919)
> > 
> > 
> > lspci output --> http://consultcsg.com/lspci.out
> > full dmesg output --> http://consultcsg.com/dmesg.out
> > 
> A similar problem has been bothering my box since last August, see
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=278721
> 
> However, when the box is rebooted (warm boot) the problem disappears and
> the 128 M reserved for AGP aperture in BIOS is found and used. The
> problem is there only if and when the box is cold-booted.
> My box has an ATI Radeon 9200 PRO VGA compatible controller with nvidia
> chipset. The motherboard (Asus K8N) BIOS has no IOMMU option.
> 
> HTH, Antti
> 
> 
> > 
> 
In my scenario I didn't cold boot, it was just a kernel update and then
a reboot.

Also, I don't even have an AGP slot.  So that confuses me even more.
The Asus K8N-DL is a PCI-E Graphics Motherboard.

Sean

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