**VIDEO GUIDE - A little about Passthrough, IOMMU Groups and breaking them up **
Hi guys. This video is about PCIe passthrough. It discusses what IOMMU is and how it works, the PCIe architecture and how it can effect iommu groupings. The video also shows some solutions for dealing with passing through devices when they are not alone in an iommu group. Hope its useful.
I know it sounds stupid, but have you tried to power off your server (remove the ac plug for 10 seconds) ? Sometime in my case the motherboard seems to lockup the control of the i2c bus. The only way to make it work again is to power it off. Hope it will help.