id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 11321,PCI passthrough failed on A4-5300+A85X M/B....,cmwang,,"I had an A4-5300+A85X system which support IOMMU and is enabled in BIOS. When I try to let the guest access some I/O directly via pci passthrough,sometimes the vboxpci says iommu_attach_device fail(just like [https://forums.virtualbox.org/viewtopic.php?f=7&t=51143]),but sometimes success. And the guest could detect the device but does not receive any interrupt. But I am failed to building VirtualBox by myself,any advice??",defect,closed,other,VirtualBox 4.2.6,obsolete,IOMMU,,other,Linux