treos33 Posted November 26, 2019 Share Posted November 26, 2019 I'm trying to play around with a few VMs on a new machine but I can't enable IOMMU. I've enabled VT-d and VT-x in bios. The only other virtualization option I see is Intel TXT which I have disabled. I've attached a snip of my system info and my diagnostics. Thanks! valentine-diagnostics-20191126-0217.zip Quote Link to comment
jonp Posted November 26, 2019 Share Posted November 26, 2019 The answer definitely lies somewhere in the bios. Got a link to the manual?Sent from my Pixel 3 XL using Tapatalk Quote Link to comment
treos33 Posted November 26, 2019 Author Share Posted November 26, 2019 This is as close as I can find to a manual. Also forgot to mention I briefly had Proxmox installed on this box and I don't remember having any issues with IOMMU. Quote Link to comment
jonp Posted November 26, 2019 Share Posted November 26, 2019 What about a bios update?Sent from my Pixel 3 XL using Tapatalk Quote Link to comment
treos33 Posted November 26, 2019 Author Share Posted November 26, 2019 Yeah I can try that next. I'm on the same bios I tested Proxmox on and it's not exactly ancient. Quote Link to comment
treos33 Posted November 30, 2019 Author Share Posted November 30, 2019 So I finally figured out part of the mystery. Whenever I have my 4 port NIC (HP NC364T) installed, IOMMU gets disabled. The next part of the mystery is why is this happening? I would like to use this NIC to passthrough to VMs at some point. Also, I did update the bios to the most recent version but it made no difference with this behavior. Quote Link to comment
JDBaron25 Posted September 29, 2022 Share Posted September 29, 2022 Did you ever make any progress on this? I have the same issue. VT-d is enabled via the BIOS, but when I install a 4port nic that I intend to use with VM's, iommu is disabled. Quote Link to comment
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