george_karl Posted September 19, 2018 Share Posted September 19, 2018 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 Quote Link to comment
george_karl Posted September 21, 2018 Author Share Posted September 21, 2018 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 Quote Link to comment
glennv Posted September 23, 2020 Share Posted September 23, 2020 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 ? Quote Link to comment
jamesy829 Posted January 5, 2021 Share Posted January 5, 2021 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 Quote Link to comment
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