On 5/30/07, Feizhou <feizhou at graffiti.net> wrote: > Bart Schaefer wrote: > > We have not tried building a kernel, nor installing any drivers or > > other kernel-related software other than that available from the > > CentOS project repos. However, the machine is fully yum-updated. > > So you also do not have the IOMMU enabled in your boxes? % dmesg | grep -i iommu Please enable the IOMMU option in the BIOS setup PCI-DMA: using GART IOMMU. PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture