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 >
