<HTML><BODY>I'm trying to get GPU passthrough to work, but haven't gotten very far. I'm losing my mind trying to figure out what could be the problem. I'm working with a 5820k and an ASUS X99-A II, both of which support IOMMU. I enabled VT-d in the UEFI settings and added intel_iommu=on to GRUB. I restart, and when I cat /proc/cmdline I can see the option is there there but it had no effect. There's nothing under /sys/kernel/iommu_groups, there is no iommu_group folder under /sys/bus/pci/devices/MYBUS/, and when I grep dmesg I get a generic "DMAR: IOMMU enabled" messages and a warning that I don't have AMD IOMMUv2 functionality but that's it. dmesg contents: http://ptpb.pw/ZpcL Any ideas what I'm missing?</BODY></HTML>