[SOLVED - conditionaly] PCIe USB card passthrough fails: no bootable device found

[khartahk]

I'm running a Windows 10 VM with Radeon RX570 passed through.

 

After I add a PCIe USB card to the VM under Other PCI devices I get the following error when booting:

no bootable device found

 

Screenshot:

 

I've tried enabling PCIe ACS override and VFIO allow unsafe interrupts but it doesn't help.

 

I'm guessing it somehow changes the bus numbers and tries to boot from this USB controller but I really don't know where to continue.

 

Any help would be appreciated.

logs-20200618-1903.zip

Edited February 10, 2021 by khartahk
fixed title

[jonp]

Can you try creating the VM using OVMF instead of SeaBIOS and see if the issue persists?

[khartahk]

I'll try converting the Windows VM so that I can boot it using OVMF an UEFI. I guess I'll need to add the GPUs VBIOS so that I'll be able to boot. This was not required using SeaBIOS and that's why I've used it.

[khartahk]

I've converted the VM so that it supports OVMF and booting with UEFI and now the machine boots without any issue and gets into Windows. PCIe USB card is detected and the peripherals also work flawlessly. For now I've solved my issue but it's weird that the error occurred in the first place.

Edited February 9, 2021 by khartahk
added link to the SeaBIOS to OVMF conversion post