A VM passthrough that had been working up to 6.12.4 inclusive (relevant config files/screenshots attached)W10.xml no longer works with 6.12.6 (I skipped .5, but from the release notes I suspect the issue was introduced there). Launching the VM now throws an Execution Error:
internal error: qemu unexpectedly closed the monitor: 2023-12-08T18:46:07.612555Z qemu-system-x86_64: -device {"driver":"vfio-pci","host":"0000:06:00.4","id":"hostdev3","bus":"pci.4","addr":"0x0.0x3"}: vfio 0000:06:00.4: error getting device from group 20: Invalid argument Verify all devices in group 20 are bound to vfio- or pci-stub and not already in use
IOMMU group 20 only contains 1 device, and it is bound to vfio- (as per the attached screenshot - the page and log output look exactly the same between 6.12.4 and 6.12.6.
Rolling back to 6.12.4 restores VM functionality.
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