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

[root at yoshi.dynu.com]

I still made no progress.

I tried with grid k2 bios, the extracted gtx680 bios as well as with 
rombar=0 for the card. I cannot get any output for the card.

I was told that quadro/grid cards will just work as secondary card when 
passed through, however when using an emulated card i get a code 12 (no 
free resources for device) in windows. When trying a linux guest nouveau 
drivers and Xorg server go berserk.

In the kvm irc channel someone told me that i should assign another 
interrupt to the card. I don't really know how to do that. Read through 
the man page of qemu multiple times but didn't find anything.

Also 'overflow' said that there is a way to spoof the device ID of the 
passed through device. I cannot find any info how to do that.

Since passthrough works fine with the GT 9600 i thought that it might be 
the motherboard and switched the cards positions on the board but no 
difference.

Any input is welcome! Poorly re-soldering the GTX 680 back to it's 
original state is not an option right now... ( would need to find 
someone who is good at SMD-soldering since i am not )