On Tue, 2014-06-03 at 08:49 -0400, William Melgaard wrote: [...] > Additional research has found that the 900 series of AMD Northbridge > has reconfigured registers. 'Reconfigured' compared to what? > Other users with similar Northbridge > have reported similar problems. > Peculiarly, booting this machine with an i386 live CD does recognize > USB devices. Some motherboards using this chipset are reported not to work properly under Linux unless the IOMMU is enabled by the BIOS. Linux's AMD IOMMU driver is only included in 64-bit kernels, so that might have something to do with the fact that the i386 live CD worked, but it doesn't really make sense to me. Anyway, can you check whether there is an option for the IOMMU in the BIOS setup program? Ben. -- Ben Hutchings Any sufficiently advanced bug is indistinguishable from a feature.
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