On Fri, Oct 18, 2013 at 12:26 PM, Fred Smith <fredex at fcshome.stoneham.ma.us>wrote: > they may have been there forever, but I never noticed them before. > This system is an AMD Phenom-II X2 CPU on a Gigabyte MA770-UD3 motherboard. > > I have no idea which BIOS option I need to change to solve this, I see > nothing in the setup that refers to IOMMU. > > The IOMMU supports I/O virtualization. As far as I can tell your motherboard's chipset does not implement an IOMMU, they're not all that common on desktop systems. You can probably just ignore this message. Gé