My first attempt at installing Qubes brought up a dialog indicating AMD-Vi and interrupt remapping wasn't available. I know my hardware supports the necessary virtualization extensions (AMD FX-8120 on a 990FX mobo), so further investigation suggested that the bios was probably buggy.
I updated the bios but still no luck, so I tried a manual procedure as described at : I ran a recent live linux distro from a USB key and confirmed that interrupt remapping was disabled by default due to this BIOS bug. I then figured out the IOMMU and SMBus addresses using the described procedure and managed to get the live linux to boot with interrupt remapping and virtualization enabled as reported by dmesg. I tried the same ivrs_ioapic mapping procedure for the Qubes installer, but it still raises that dialog saying no interrupt remapping, AMD-Vi, etc. Running dmesg in the Qubes installer console reports only that IOMMUv2 is not available, which the live linux also reported, but no other errors. The dmesg output is a little different though, so perhaps I missed something. Any suggestions on what to do next?  https://superuser.com/questions/1052023/ioapic0-not-in-ivrs-table -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/5d55910b-d677-44dd-a11e-7004f46f965b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.