[vfio-users] Cannot fix Error 43 for GTX 680 passed through to win 10 guest

[root at yoshi.dynu.com]

i am still stuck.

i read the whole thread in the archlinux forum (and feel a bit ashamed 
for using arch right now, maybe give fedora a try)

i tried win 7 / win 8 and win 10 as guest with 440fx.

Only way to get any output on the card it to use 'vga none and degrading 
the card to a gtx 680 again by spoofing the device id. no output when i 
also add the extracted bios of the card.

When assigning the already hardmodded id of an Grid k2 the VM shuts down 
after ~1 minute. (with or without k2 BIOS)

When spoofing the cards ID making it a Quadro K5000 i neither get any 
output. (with or without k5000 bios)

when trying k2 or k5000 i started the machine with emulated graphics. 
The VM detects the card but will still give me Code 43 when installing 
the drivers.

Checked again that the devices i'd like to pass through are claimed by 
the stub with 'lspci -nnvk'

How can i run qemu fully verbose to investigate further where the 
problem might be?

Best regards,

Arne



Am , schrieb Alex Williamson:
> On Sat, Oct 10, 2015 at 1:12 PM, <root at yoshi.dynu.com> wrote:
> 
>> Is there any point in editing the gtx680s bios and change the device
>> id there?
>> 
>> i tried the patch to spoof the devID but somehow managed to mess up
>> my hosts libraries really bad... need to reinstall and start clean.
>> 
>> i use q35 system for now since with 440fx the guest is not
>> restarting and it takes ages for the initial install/setup. But i am
>> willing to try again with 440fx.
> 
> Grid cards assigned the way I'm describing have no need for the ROM,
> so no, it doesn't make sense to hack the ROM.  On RHEL, we currently
> only support Grid assignment with a 440fx VM, so you may want to look
> at why that's misbehaving for you.  Use rombar=0 to disable the GPU
> ROM entirely and see if that helps anything.  Also, for PCI IDs, run
> qemu with "-device vfio-pci,?", if it's new enough, you'll find what
> you need.