On 12/31/25 1:57 PM, Stephen Morris wrote:
I have selected "Add Hardware->PCI Host Device" and then selected the
only device that is identified as being a Mediatek device and clicked
"Finish". When I then started the VM the start failed with the following
messages:
Error starting domain: internal error: QEMU unexpectedly closed the monitor
(vm='fedora'):2025-12-31T21:41:39.9034658Z qemu-system-x86_64: -device
{"driver":"vfio-
pci","host":"0000:08:00.0","id":"hostdev0","bus":"pci.7","addr":"0x0"}:vfio
0000:08:00.0: group 15 is not viable
Please ensure all devices within the iommu_group are bound to their vfio
bus driver.
I did a bit of research on this and it can get a bit complicated.
Do you have an Intel or AMD system?
Have you enabled all the virtualization and iommu options in the BIOS?
What does the following command give you?
for d in $(ls /sys/kernel/iommu_groups/15/devices/); do lspci -nnvs
"$d"; done
Without that device the VM boots quite happily, and from what George was
showing, the second version of the 6.18 kernel doesn't appear to have
support for the chipset that I read was supposed to be being provided in
the 6.18 kernel. It may be too early in the kernel release.
I've checked the host system and the device that I think is the wifi
device, as shown by INXI has bus-ID 08:00.0 which is the bus address
shown in the message above, so I believe I have selected the correct
device. The only thing I can think of is QEMU is expecting the host to
have provided a driver for that device which in the current kernels
doesn't exist, and, if that is the case that defeats the purpose of the
test I'm trying to do which is check if the 6.18 kernel is going to
provide a driver. Am I looking at things incorrectly?
The driver might not be available yet:
https://marc.info/?l=linux-wireless&m=176721477530840&w=2
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