GPU Passthrough - not displaying boot sequence

T

tsumaru720

Renowned Member
May 1, 2016
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Hi All

I've been playing around with GPU passthrough recently and whilst I've got it working - I only ever get anything displayed once the guest OS has booted and the driver has loaded. I dont see any of the boot sequence or even the EFI loading screen.

I've tried a different vbios for my card too but this has the same behaviour - Does anyone have any ideas what might be stopping the display working outside of the drivers being loaded on the guest?

Thanks
 
I have a similar thing with a GPU that has no EFI support in the BIOS of the card (too old). I could not get my HD 7750 passed through as the primary GPU without OVMF.

My work-around is to add serial0: socket and vga: serial0 to the VM configuration.
Inside the VM I added console=tty0 console=ttyS0 to the GRUB_CMDLINE_LINUX_DEFAULT setting and also added GRUB_TERMINAL=serial to /etc/default/grub (run update-grub afterwards).
This way, I can watch the GRUB menu and the Linux boot process via a virtual serial terminal using qm terminal.
 
Hi there

Thanks for the feedback - but in this instance I dont think it'd help as my guest is Windows (Although I do have this issue with both Linux and Windows guests).

I'm pretty sure my card has a proper EFI rom (I cant remember the tool I used to check but it dumped the vbios from the card and said it was EFI capable (As did the rom I downloaded)

I have an nvidia 1050ti if thats important
https://www.techpowerup.com/vgabios/197634/msi-gtx1050ti-4096-170710
 
Simon Mott said:
Hi there

Thanks for the feedback - but in this instance I dont think it'd help as my guest is Windows (Although I do have this issue with both Linux and Windows guests).

I'm pretty sure my card has a proper EFI rom (I cant remember the tool I used to check but it dumped the vbios from the card and said it was EFI capable (As did the rom I downloaded)

I have an nvidia 1050ti if thats important
https://www.techpowerup.com/vgabios/197634/msi-gtx1050ti-4096-170710
Click to expand...
hey how you doing?

so i found myself having the same issue.

i can confirm its about the graphics card because:
it was working with my 1650 and its not working with my newly 3060 EVGA.

i went back ot the 1650 just to confirm today, and it is indeed because of that. Problably if i use a different port (hdmi for eg.) it might work?

i need to check
 
just checked. no luck with HDMI port either. i guess its about the card. for me, 3060 doesnt do it. but 1650 does it. strange things but it is what it is
 
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