Comment 44 for bug 1580459

Apparently Passthrough devices work better when using a MSI Interrupt instead of a traditional interrupt.

See post 32 https://bugs.launchpad.net/qemu/+bug/1580459/comments/32 item 2.

2. I enabled MSI Interrupts on the GPU using this URL as my reference.
    http://lime-technology.com/wiki/index.php/UnRAID_6/VM_Guest_Support#Enable_MSI_for_Interrupts_to_Fix_HDMI_Audio_Support

Chris