SOLVED - Windows 10 AMD GPU Passthrough

[BastiArts]

Hey guys,

I'm trying to pass through my Saphire R9 280 for countless hours now but it always ends up that the "windows spinning dots" are getting stuck. (Or a bluescreen [KERNEL_SECURITY_CHECK_FAILURE] caused by the CPU config in the VM-XML which i need to set to "host-model" instead of "host-passthrough").

If I switch to VNC (+ CPU mode "host-model" in XML) instead, Windows boots up perfectly.

 

Switching to Q35-4.2 instead of i440fx-4.2 seem to fix this "boot issue" but as soon as I can access the Desktop of the VM, Win10 freezes, Unraid reboots and a parity check is started.

 

Btw I'm using the Unraid 6.9.0-beta25 version, because the last stable didn't work for my motherboard.

 

This GPU is the only GPU in the system, so I tried everything Spaceinvader One explained in his GPU-Passthrough videos.

I tried:

• dumping the vbios manually
• using the vbios of techpowerup
• putting the GPU in a seperate IOMMU-Group
• setting the line "append pcie_acs_override=downstream,multifunction initrd=/bzroot video=efifb:off" on the flash's syslinux config
• booting the VM with VNC only to install the AMD Driver (which fails)

 

The diagnostic of the rebooted Server is attached below.

 

Thanks in advance. Kind Regards,

Basti

tower-diagnostics-20200826-1928.zip

Edited November 29, 2020 by BastiArts
Solved

[zen89]

On 8/26/2020 at 11:31 PM, BastiArts said:

Hey guys,

I'm trying to pass through my Saphire R9 280 for countless hours now but it always ends up that the "windows spinning dots" are getting stuck. (Or a bluescreen [KERNEL_SECURITY_CHECK_FAILURE] caused by the CPU config in the VM-XML which i need to set to "host-model" instead of "host-passthrough").

If I switch to VNC (+ CPU mode "host-model" in XML) instead, Windows boots up perfectly.

 

Switching to Q35-4.2 instead of i440fx-4.2 seem to fix this "boot issue" but as soon as I can access the Desktop of the VM, Win10 freezes, Unraid reboots and a parity check is started.

 

Btw I'm using the Unraid 6.9.0-beta25 version, because the last stable didn't work for my motherboard.

 

This GPU is the only GPU in the system, so I tried everything Spaceinvader One explained in his GPU-Passthrough videos.

I tried:

• dumping the vbios manually
• using the vbios of techpowerup
• putting the GPU in a seperate IOMMU-Group
• setting the line "append pcie_acs_override=downstream,multifunction initrd=/bzroot video=efifb:off" on the flash's syslinux config
• booting the VM with VNC only to install the AMD Driver (which fails)

 

The diagnostic of the rebooted Server is attached below.

 

Thanks in advance. Kind Regards,

Basti

tower-diagnostics-20200826-1928.zip 87.7 kB · 0 downloads

Any updates here? Been facing the same issues.

[BastiArts]

On 10/20/2020 at 3:42 PM, zen89 said:

Any updates here? Been facing the same issues.

I solved that issue by binding this IOMMU group at boot. (probably I overlooked it)
 

Quote

[1022:790b] 00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 61)

[1022:790e] 00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)

[1022:1440] 00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 0

[1022:1441] 00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 1

[1022:1442] 00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 2

[1022:1443] 00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 3

[1022:1444] 00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 4

[1022:1445] 00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 5

[1022:1446] 00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 6

[1022:1447] 00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Matisse Device 24: Function 7

Now I'm facing this issue. But the passthrough thing still works.

Regards,
Basti