unRAID fails when enabling VT-d

[eribob]

I have built a server using the huananzhi x79 8d motherboard, dual intel xeon e5 2670 (v1), 64GB of ECC ddr3 RAM. The GPU is an old radeon HD 6870 and I have a monitor plugged in to it, since the motherboard does not have on board graphics. 

 

I would like to try to pass through a GPU to a windows 10 VM and turned on intel virtualization in the BIOS settings. However, when I do this, unRAID does not load normally. I have attached some screenshots. 

 

It seems to be unable to find some hardware. For example, I get one of those IP addresses beginning with 169.x.x.x that you get when there is no connection to a DHCP server. I also attach som pictures I took during the boot process of unRAID.

 

If I turn of intel virtualization unRAID boots normally and functions fine, but I can only assign VNC graphics to the VM:s. 

 

Do you have any suggestions what could be the problem? 

 

Thank you! 

Erik

[Squid]

Enable UEFI boot on the stick and select that in the BIOS (or legacy mode if already using UEFI).  Just something to try...

[eribob]

I tried that already (UEFI->legacy). No luck :(

[eribob]

An update: I got it to work by moving my Unraid USB to a USB2 port as suggested elsewhere in the forum. 

[constellation]

Glad to see that it worked. Were you able to do GPU passthrough with this card? I have the same card and will be reusing it for a new unraid build this weekend. (my current build doesn't support VT-d, but the new build will). Just wondering if the card was OK with GPU passthrough and if you encounter the reset bug at all.

[eribob]

Hi, 

yes, I had no problems passing through my radeon rx 580 to both a windows and a mac os VM. 
 

best if luck! 

[testdasi]

30 minutes ago, eribob said:

Hi, 

yes, I had no problems passing through my radeon rx 580 to both a windows and a mac os VM. 
 

best if luck! 

Are you able to restart your VM without needing to restart the server?

[eribob]

Hi, 

yes i can. I can not restart the vm through windows start menu from inside the VM, but I can restart it with the unraid interface. Quite often I have to ”force stop” it and start again though. 
 

restarting the server is not necessary though. 

[flying_rabbi]

On 12/22/2019 at 3:16 PM, eribob said:

An update: I got it to work by moving my Unraid USB to a USB2 port as suggested elsewhere in the forum. 

Had the same problem here with the same motherboard. This post saved me tearing my hair out, wish i had of found it 3 hours ago haha.

[saz]

worked the problem all night long! thanks posted the solution