Hi,

 

I tried several times to use OVMF for my VMs with pass-through GPU, but I always ended up with a blank screen (the monitor light is flashing like there is no input). I don't have any problems with Seabios, even the USB controller pass-through is working fine.

 

My specs are

Asus M32CD machine with an oem ASUS motherboards

i7-6700

16GB RAM

oem ASUS graphic card (similar to Asus R9 270 2048 MB)

 

I think the graphic card supports UEFI booting, because initially this was a Windows 10 machine.

 

Attached is the diagnostic file.

 

Please help me troubleshoot this.

 

Thanks

unraid-diagnostics-20161113-1020.zip

I had the same problem, you have to manually include the bios of the video card you own:

 

http://lime-technology.com/wiki/index.php/UnRAID_6/VM_Management

 

https://www.techpowerup.com/vgabios/

 

Try to find the bios for your video card and include it on your VM configuration. On your VM, once you install the drivers, the GPU passthrough will work. However you need to include the VGA Bios or else you'll never be able to see the boot sequence or any errors that might come up during bootup.

Thanks. I managed to fix the problem.

 

At first, I tried to use the bios that I found on the techpowerup, but still the screen was blank so I use VNC as primary display and my GPU as secondary. That showed me an error about invalid ROM right after the OS was booting. I managed to get the right bios and add it to the VMs, but the machine wasn't booting all the time, or sometimes the GPU wasn't properly initialized. Testing further I realized that I was booting UNRAID with the GPU being the console display, and not the integrated graphics, which prevented OVMF from working properly and GPU's bios wasn't read properly from the card. After changing them in BIOS, everything is working normally and the OVMF works without providing any rom file.

 

Now, for all the Seabios machines that I have may take up to 10 second just to show the seabios screen... This was my main reason for using my GPU as  the console display... Anyway I'll change my VMs to OVMF and hopefully they'll work.

 

Thanks again.