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

[Sinisa Tkalec]

https://bbs.archlinux.org/viewtopic.php?pid=1475170#p1475170


On 10/10/2015 04:14 PM, root at yoshi.dynu.com wrote:
> 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 )
>
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