Fix: Add rombar=0 to GPU passthrough to prevent boot hangs with incompatible GPU firmware

aliel · nesitor · commit 53edcca1d7ea · 2025-11-19T10:23:04.000+01:00
diff --git a/src/aleph/vm/hypervisors/qemu/qemuvm.py b/src/aleph/vm/hypervisors/qemu/qemuvm.py
@@ -155,7 +155,7 @@ def _get_gpu_args(self):
             "host,host-phys-bits-limit=0x28",
         ]
         for gpu in self.gpus:
-            device_args = f"vfio-pci,host={gpu.pci_host},multifunction=on"
+            device_args = f"vfio-pci,host={gpu.pci_host},multifunction=on,rombar=0"
 
             # Only add x-vga=on parameter if the GPU supports it
             if gpu.supports_x_vga:

Original file line number	Diff line number	Diff line change
`@@ -155,7 +155,7 @@ def _get_gpu_args(self):`
`155`	`155`	`"host,host-phys-bits-limit=0x28",`
`156`	`156`	`]`
`157`	`157`	`for gpu in self.gpus:`
`158`		`- device_args = f"vfio-pci,host={gpu.pci_host},multifunction=on"`
	`158`	`+ device_args = f"vfio-pci,host={gpu.pci_host},multifunction=on,rombar=0"`
`159`	`159`
`160`	`160`	`# Only add x-vga=on parameter if the GPU supports it`
`161`	`161`	`if gpu.supports_x_vga:`