IOGear USB HDMI Adapter

My VM server had an AMD HD 6570 that passed through to Windows XP.  That worked for a while, but I started to have issues.  The card started to display horizontal lines and it wasn't fast enough to bump of the quality in some games.  I decided to upgrade to an AMD HD 7870 (Ghz edition).  I figured I could use the new card for Windows XP, where I do my gaming, and the old card for the Windows 7 VM.  I use the Windows 7 VM for upgrading our phones and other things that mess around with drivers.  There was not enough physical room in the computer for the 3rd video card, however.  That is when I decided to buy the IOGear USB HDMI Adapter.  The Windows 7 VM has a PCI Express AS Media ASM1042 USB3 controller passed through to it.

I plugged in the adapter and Windws 7 recognized it.  It listed it as 3 separate but related USB devices.  It green checks for two and a red X for one.  For a fancy device like this, I can't expect Windows 7 to have the drivers already.  I popped in the drivers cd and installed the software.  After a reboot, Windows 7 had three green checks.  I still wasn't able to use it, though.  The Display->Screen Resolution screen did not show a second screen.  After a reboot, I got a popup telling me that there was a driver update for the HDMI Adapter.  I clicked ok to update and had to reboot again.  After that reboot, I got a popup telling me the drivers were not supported on my computer and that I should update the drivers.  The device still doesn't work.

Running inside of a VM causes issues.  If you can get PCI passthrough working for a USB controller, then most USB devices will work in the VM.  Some software tends to have issues inside of a VM as well.  This means more obscure USB hardware has two things working against it from working inside of a VM.  1) The USB device itself might not like being passed through to a VM and 2) The required software for the device might not work correctly inside of a VM.  I don't know if one of these two scenarios is what is causing the device to not work.  I can try on another computer, but I have very few real Windows computers.  I tend to uninstall Windows on any computers I buy and use their licenses in the VMs.