Whenever I run my Windows 7 or Windows 10 VM with my AMD RX 560 card passed thru the system runs for an hour or two and then the entire UNRAID system halts with the above error.

 

I have done a number of google searches and I can not find what an error 40 means.

 

Can anyone help?

 

Solutions for other DMAR: DRHD errors is to add an line in the Kernel parameter intel_iommu=off

 

Thanks

George

Updated:

 

I was determined to fix this issue:

1) I downgrade the AMD drivers - NO CHANGE

2) Removed the AMD driver and reverted back to the stock Windows 10 driver - NO CHANGE

2) I moved the card to  a different slot- NO CHANGE

3) I removed the card and replaced it with an older AMD card with support for the same drivers - FIXED

 

I also put the card in a standalone Windows 10 machine (as I thought maybe there was a defect in the card) and it has run stable for over 24 hours now. I think the card is good.

 

If you are using a AMD RX 5xx card via pass-thru to a Win 7 or Win10 machine please post and let me know if you have been successful. I know there have been alot of issues with the AMD RX cards with pass thru. Before I buy another one I want to make sure I am not going to have issues. 

 

Thanks

Crap i seem the have the same issue today but with a brand new 5700xt passed to a OSX VM

First time ever in years i have my Unraid server lockup with this exact error in the logs..

Did you even find the cause / solution ?

Just bumping this to ask if this has been resolved? I am also running into this issue, passing through AMD RX580 to a OSX VM and it locks up unraid server