[SOLVED] Problem with PCI passthrough, GPU not showing in Windows Task Manager

[Exio]

Hi guys

I followed this guide https://pve.proxmox.com/wiki/PCI_Passthrough to Passthrough my Nvidia Tesla K20XM to a VM. I think the passthrough is working but its like "more or less". My Windows 10 Pro detects the Graphic Card but it doesnt process anything with it, check this:



The PCI Device is the Graphic Card, ok..



The task admin doesnt recognise the graphic card so i can understand what i have said before, the VM is not working with the graphic card but then in the devices admin:



It is here...

So my doubt is, is this a Windows problem or a passthrough problem? I have tried to check this option but the VM wont go up:



Giving me this error:



I need that VM to recognise the graphic card as, for example, my PC does:



Any help, please? Thanks in advance

 

[Exio]

Adding information:

/etc/default/grub
https://pasteboard.co/rwB9iSZ3MblE.png

Blacklist.conf:
https://pasteboard.co/9okzK29gBe7u.png

vfio.conf:
https://pasteboard.co/SG65Fn35b8pa.png -> https://pasteboard.co/NPgKDHwMLGon.png

kvm.conf:
https://pasteboard.co/P6qCbGgrFV4c.png

iommu_unsafe_interrupts.conf:
https://pasteboard.co/yAL8noBBgf8H.png

And i also tried to install Nvidia drivers in the host:
https://pasteboard.co/0W2S0MQqTN70.png

 

[gfngfn256]

2 things that I'd try:

1. Disable numa for the VM.

2. In Windows Device Manager you are showing 2 PCI controllers that are (probably) without drivers. Try installing drivers for them. You may need/also VirtIO drivers. See here.

 

[Exio]

I have made another new VM with this configuration, in the host, all is the same as i commented before:

2 things that I'd try:

1. Disable numa for the VM.

2. In Windows Device Manager you are showing 2 PCI controllers that are (probably) without drivers. Try installing drivers for them. You may need/also VirtIO drivers. See here.

Ok, i have disabled numa and installed VirtIO drivers, Windows Device Manager now shows this:



I have rebooted the VM but the task manager still without showing up the graphic card:

 

[gfngfn256]

AFAIK the Nvidia Tesla K20XM does not have any Display/Output Connectors, are you sure it is still supposed to show up in Windows Task Manager?
(The image you show above appearing in Task Manager is of Nvidia GTX1050 which does have Display/Output Connectors).

Edit: See this discussion.

 

[Exio]

AFAIK the Nvidia Tesla K20XM does not have any Display/Output Connectors, are you sure it is still supposed to show up in Windows Task Manager?
(The image you show above appearing in Task Manager is of Nvidia GTX1050 which does have Display/Output Connectors).

Edit: See this discussion.

I really dont know if not having display connector means that it wont appear in the Windows Task Manager, but i think it should appear because this question “how do i know if the host is processing anything with that graphic card?” There is no way to know if im not seeing any activity.

Have watched that discussion and the truth is that i have wddm 1.3 and not 2.0 or higher that is supossed to work with task manager as i have read in many forums. Will ask my provider and comment the result

 

[Exio]

I really dont know if not having display connector means that it wont appear in the Windows Task Manager, but i think it should appear because this question “how do i know if the host is processing anything with that graphic card?” There is no way to know if im not seeing any activity.

Have watched that discussion and the truth is that i have wddm 1.3 and not 2.0 or higher that is supossed to work with task manager as i have read in many forums. Will ask my provider and comment the result

The WDDM driver is for the Microsoft Basic Display Adapter, not for the Nvidia Tesla K20Xm...

Im whatching this...

https://forum.level1techs.com/t/gaming-on-my-tesla-more-likely-than-you-think/171185/364?page=18

lets see if i can do this...

 

[Exio]

The WDDM driver is for the Microsoft Basic Display Adapter, not for the Nvidia Tesla K20Xm...

Im whatching this...

https://forum.level1techs.com/t/gaming-on-my-tesla-more-likely-than-you-think/171185/364?page=18

lets see if i can do this, no one but you seems to want to help here...

Solved:

https://www.dell.com/support/kbdoc/...e-control-de-nvidia-en-el-servidor-de-windows

Just need to run 2 commands on PS and it worked. Those commands are:

nvidia-smi -fdm 0

nvidia-smi --gom=0

And reboot the VM

EDIT: To add some more info, this graphics card came as "Processing only unit", TCC (in a manner of speaking), so you have to change this to WDDM to see it in the Windows Task Manager. What i have encountered is that in TCC mode, the graphics card didnt work, dont know why, but in WDDM mode it works perfectly. In fact, this commands allows you to change the TCC mode to WDDM mode. Just remember to install Nvidia drivers to use

nvidia-smi

 

[gfngfn256]

Happy you solved it. So in fact its a Windows-centric problem, not a Proxmox one. (In fact I believe, based on your attached Dell-PowerEdge post, that even if you installed bare-metal, you'd encounter the same experience). But its still useful on this awesome forum, so if someone else encounters a similar experience, you've helped him/her. Thanks.

 

[Exio]

Happy you solved it. So in fact its a Windows-centric problem, not a Proxmox one. (In fact I believe, based on your attached Dell-PowerEdge post, that even if you installed bare-metal, you'd encounter the same experience). But its still useful on this awesome forum, so if someone else encounters a similar experience, you've helped him/her. Thanks.

It took me some time to find that Dell post, so yes, i hope i help some people in the future. Thanks to you mate!