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Re: [vfio-users] Guest does not boot OS with GPU passed through, stuck at TianoCore boot splash



On 04/11/16 22:11, Laszlo Ersek wrote:
> On 04/11/16 21:48, Stefan Seil wrote:
>> Thank you for the detailed explanation!
>> I did this and have uploaded the log here: http://pastebin.com/BXU9UqiG
>> I don't really see any apparent errors in there...
> 
> Right, I expected a failed ASSERT() or something similar, but I'm not
> seeing a direct error anywhere.
> 
> What I can see from the log is:
> 
> - Two instances of "AmdGop.efi" starting. (Note: that doesn't mean they
>   are actually binding the card(s) yet.) The number two is strange. Do
>   you have two assigned GPUs? Can you share your domain XML?
> 
> - I can see three instances of EfiGraphicsOutputProtocol being
>   produced. One of them belongs to the QXL driver built into OVMF.
>   Again, do you have two assigned GPUs?

Hm, one of those GOPs is probably produced by the console splitter
driver, so please ignore this one paragraph.

> - The boot process advances pretty far beyond the above. The last
>   message is related to the USB bus driver
>   (MdeModulePkg/Bus/Usb/UsbBusDxe). Are you assigning USB devices too?
> 
>   In your email, you wrote, "If I remove the PCI devices from the VM,
>   the OS boots without problems." -- device*s*, plural. Did you perhaps
>   mean "PCI devices" generally as "assigned devices"? If so, what
>   happens if you keep the GPU(s), but remove the assigned USB devices
>   from the domain XML?
> 
> Thanks
> Laszlo
> 
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