March 12, 20233 yr Just picked up a Caldigit TS4 Thunderbolt dock. Has anyone had any luck getting this passed through to a Windows VM? I believe I have the Thunderbolt and USB4 controllers passed through correctly, and the Thunderbolt Control Center shows the TS4 is connected. No USB devices are detected when plugged into the dock, and the built-in Ethernet controller is not detected.
March 13, 20233 yr Author Some progress, perhaps. I'm not sure if it changed anything, but I removed and re-added the Thunderbolt controllers in the VFIO configuration, after enabling "Both" for "ACS Override". As a correction for the above, it appears that USB storage devices *do* get detected, including both of the SD card reader slots. However, things like Bluetooth dongles, Razer wireless mouse & keyboard receivers, etc. do not pass through to the VM automatically -- but *can* be mapped via libvirt USB. I have an external USB audio interface (MOTU Ultralite mk3) that did not get detected inside the VM automatically, and also could not be passed through libvirt. I have no idea why storage devices would "just work" and other classes of devices do not. Is there a way to "manually" map in these IOMMU groups that don't have checkboxes? The "Goshen Ridge 2020:" device is the Caldigit TS4. I tried a quick DisplayPort passthrough test which didn't seem to work. GTX1080 -> DP-In -> Thunderbolt-Out -> Caldigit TS4 -> Thunderbolt-Out -> USB-C to HDMI active adapter -> TV. saturn-diagnostics-20230312-1828.zip
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