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GSI (Global System Interrupt) is a Linux concept, but it means the physical interrupt signal from the passed-through PCI device (GPU or USB controller) is not be= ing correctly mapped by the hypervisor into a signal the guest OS can understan= d. Commits touching the core interrupt handling between the host's IOMMU hardw= are (VT-d/AMD-Vi) and the virtualized environment are the prime suspects. Look = for PRs that: Refactor or clean up the MSI/MSI-X handling within the vmm driver. Update core IOMMU register access or error handling code. Change the logic for x2APIC or IO-APIC interrupt injection into the guest. --=20 You are receiving this mail because: You are the assignee for the bug.=