virtualization - Fail to Nvidia GPU passthrough in Ubuntu - Ask Ubuntu

i followed this post setup passthrough. referred other articles. installed driver following this article.

i tried both following options qemu 2.2:

-device ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1 \                 -device vfio-pci,host=02:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on \ -device vfio-pci,host=02:00.1,bus=root.1,addr=00.1 \ -m q35 

and

-device vfio-pci,host=02:00.0,multifunction=on,x-vga=on \ -device vfio-pci,host=02:00.1 \ -vga none 

when run lspci -vv on guest:

01:00.0 vga compatible controller: nvidia corporation gk104 [geforce gtx 760] (rev a1) (prog-if 00 [vga controller])     subsystem: device 196e:0984     physical slot: 0     control: i/o+ mem+ busmaster- speccycle- memwinv- vgasnoop- parerr- stepping- serr+ fastb2b- disintx-     status: cap+ 66mhz- udf- fastb2b- parerr- devsel=fast >tabort- <tabort- <mabort- >serr- <perr- intx-     interrupt: pin routed irq 10     region 0: memory @ fc000000 (32-bit, non-prefetchable) [size=16m]     region 1: memory @ e8000000 (64-bit, prefetchable) [size=128m]     region 3: memory @ f0000000 (64-bit, prefetchable) [size=32m]     region 5: i/o ports @ c000 [size=128]     expansion rom @ fd000000 [disabled] [size=512k]     capabilities: <access denied>  01:00.1 audio device: nvidia corporation gk104 hdmi audio controller (rev a1)     subsystem: device 196e:0984     physical slot: 0     control: i/o- mem+ busmaster+ speccycle- memwinv- vgasnoop- parerr- stepping- serr+ fastb2b- disintx-     status: cap+ 66mhz- udf- fastb2b- parerr- devsel=fast >tabort- <tabort- <mabort- >serr- <perr- intx-     latency: 0, cache line size: 256 bytes     interrupt: pin b routed irq 17     region 0: memory @ fd080000 (32-bit, non-prefetchable) [size=16k]     capabilities: <access denied>     kernel driver in use: snd_hda_intel 

when run smi:

$ nvidia-smi  nvidia-smi has failed because couldn't communicate nvidia driver. make sure latest nvidia driver installed , running. 

on host:

02:00.0 vga compatible controller: nvidia corporation gk104 [geforce gtx 760] (rev a1) (prog-if 00 [vga controller])     subsystem: device 196e:0984     control: i/o+ mem+ busmaster- speccycle- memwinv- vgasnoop- parerr- stepping- serr+ fastb2b- disintx-     status: cap+ 66mhz- udf- fastb2b- parerr- devsel=fast >tabort- <tabort- <mabort- >serr- <perr- intx-     interrupt: pin routed irq 16     region 0: memory @ f9000000 (32-bit, non-prefetchable) [size=16m]     region 1: memory @ d8000000 (64-bit, prefetchable) [size=128m]     region 3: memory @ d6000000 (64-bit, prefetchable) [size=32m]     region 5: i/o ports @ cc00 [size=128]     expansion rom @ f8f80000 [disabled] [size=512k]     capabilities: <access denied>     kernel driver in use: vfio-pci  02:00.1 audio device: nvidia corporation gk104 hdmi audio controller (rev a1)     subsystem: device 196e:0984     control: i/o- mem+ busmaster+ speccycle- memwinv- vgasnoop- parerr- stepping- serr+ fastb2b- disintx-     status: cap+ 66mhz- udf- fastb2b- parerr- devsel=fast >tabort- <tabort- <mabort- >serr- <perr- intx-     latency: 0, cache line size: 256 bytes     interrupt: pin b routed irq 17     region 0: memory @ f8f7c000 (32-bit, non-prefetchable) [size=16k]     capabilities: <access denied>     kernel driver in use: vfio-pci 

i've tried figure out several days, rebinding gpu, reinstalling drivers, etc. still don't know step wrong.

did passthrough gpu successfully? how can make work on guest?

any great. in advance.