PCIe passthrough; Changing address

[Giggling3999]

Hi

Is there any way to pass through a pcie device, which may change address?

For example, I come and plug a graphics card in to my server, and start it up. Now it passes through the wrong device number

 

[leesteken]

Adding (or removing or enabling/disabling on-board) PCI(e) devices can change the PCI ID of other PCI(e) devices. This bites a lot of people here (especially with network device names) but is totally done by the motherboard (and BIOS). You need to change the VM configurations manually. Make sure to turn off Start at boot until do have fixed then all (or disable IOMMU temporarily to prevent the VMs from starting).