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kwertii

Member

Registered: 2019-09-04

Posts: 3

GPU Passthrough error 43 on windows 10 guest (getting stuck)

Hey all,

I'm in the process of putting the finishing touches on my virtualized windows 10 installation. The windows instance is actually installed on a physical disk and can be booted bare metal also. Despite my efforts following the wiki and other examples I've found, I can't seem to get rid of error 43 on my passed-through nvidia 2080. I'm using remotefx and freerdp to display my vm on my laptop screen.

I added the lines to mask the hypervisor as is outlined in the wiki troubleshooting section and can be seen in my config xml below.

libvirt xml
http://ix.io/1Vq6

grub args
GRUB_CMDLINE_LINUX_DEFAULT=... acpi_osi= video.use_native_backlight=1 nvidia-drm.modeset=1 intel_iommu=on,igfx_off iommu=pt kvm.ignore_msrs=1
* could the nvidia-drm enabling be interfering with the passthrough? I was looking at messing around with the newer nvidia driver to get switching working on my laptop but abandoned that.

IOMMU Group 1:
	00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 07)
	01:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU104M [GeForce RTX 2080 Mobile] [10de:1e90] (rev a1)
	01:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:10f8] (rev a1)
	01:00.2 USB controller [0c03]: NVIDIA Corporation Device [10de:1ad8] (rev a1)
	01:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device [10de:1ad9] (rev a1)

In virt-manager I added host pci device 01:00.0

<hostdev mode="subsystem" type="pci" managed="yes">
  <source>
    <address domain="0" bus="1" slot="0" function="0"/>
  </source>
</hostdev>

lspci info showing vfio-pci loaded appropriately.

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation TU104M [GeForce RTX 2080 Mobile] [10de:1e90] (rev a1)
	Subsystem: Gigabyte Technology Co., Ltd TU104M [GeForce RTX 2080 Mobile] [1458:75a7]
	Kernel driver in use: vfio-pci
	Kernel modules: nouveau, nvidia_drm, nvidia
01:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:10f8] (rev a1)
	Subsystem: Gigabyte Technology Co., Ltd Device [1458:75a7]
	Kernel driver in use: vfio-pci
	Kernel modules: snd_hda_intel
01:00.2 USB controller [0c03]: NVIDIA Corporation Device [10de:1ad8] (rev a1)
	Subsystem: Gigabyte Technology Co., Ltd Device [1458:75a7]
	Kernel driver in use: vfio-pci
	Kernel modules: xhci_pci
01:00.3 Serial bus controller [0c80]: NVIDIA Corporation Device [10de:1ad9] (rev a1)
	Subsystem: Gigabyte Technology Co., Ltd Device [1458:75a7]
	Kernel driver in use: vfio-pci
	Kernel modules: i2c_nvidia_gpu

I've also blacklisted nvidia and nouveau.

I'm at a loss of where to go next and could really use some input.

Thanks for reading!

Kwertii

**Edited to fix typo in grub cmdline arguments

Last edited by kwertii (2019-09-17 12:40:26)

Zod

Member

From: Hoosiertucky

Registered: 2019-03-10

Posts: 636

Re: GPU Passthrough error 43 on windows 10 guest (getting stuck)

Edit: nope, looks like you already have this covered.

Don't know if you've seen this..
https://wiki.archlinux.org/index.php/PC … F/Examples

I saw where you added lines to mask the hypervisor  and I know this is esxi but I thought it was interesting..
https://petr.io/en/blog/2017/12/26/runn … ware-esxi/

Is this right ?......GRUB_CMDLINE_LINUX_DEFAULT=... acpi_osi= video.use_native_backlight=1 nvidia-drm.modeset=1 ***intel_iommu=one***,igfx_off iommu=pt kvm.ignore_msrs=1

Last edited by Zod (2019-09-17 02:48:02)

kwertii

Member

Registered: 2019-09-04

Posts: 3

Re: GPU Passthrough error 43 on windows 10 guest (getting stuck)

Whoops, that was a typo on the grub cmdline!

I'm going through more examples now, though I skimmed through a bunch earlier.

In terms of the esxi article, I had read about masking the kernel at the cpu level, but then it apparently changes how the clock is interacted with  by the system, I can give it a shot though.

One more thing to note, when I print out the vbios, there doesn't appear to be any entry for uefi. Could that be a part of my issue?

xerxes_

Member

Registered: 2018-04-29

Posts: 1,076

Re: GPU Passthrough error 43 on windows 10 guest (getting stuck)

Maybe this is some windows register bug/error (link, link). Have you tried googling "nvidia error 43" or "nvidia error 43 fixer"? You may try to download and run that "fixer" (nvidia-error43-fixer_112.zip) under win10 vm (before that you may backup vm or do the snapshot).

Last edited by xerxes_ (2019-09-18 17:37:22)

kwertii

Member

Registered: 2019-09-04

Posts: 3

Re: GPU Passthrough error 43 on windows 10 guest (getting stuck)

I have googled those and played around with the system quite a bit. I currently have a post in on the forums for gopupd to resolve some issues when patching my vbios to add uefi (it's not an mxm card, so I don't know if this is actually okay to do).

In relation to those links, they are specifically intended for egpus it seems, though I did give them a read. I also tested the script to no avail.

Still exploring possibilities, but if this uefi rom isn't the right answer, I think I may be out of leads

**EDIT**
Might be worth noting that after running the error43 fixer script, the gpu reappears as functional to the system, then half a second later it refreshes with the same error 43. Seems like it still may be hypervisor detection related, but I could be crazy.

Last edited by kwertii (2019-09-18 18:16:16)