If your screen goes dead (or it even freezes) I would not rule this out as a power management all. Procedure I've written above could easily resolve it, I've seen this before with other devices. I just do it as routine in a DAW setup, whether there are issues or not (all audio devices have power management disabled, see link). Also the latest chipset drivers/BIOS update could make power mangement more reliable with devices. Latest audio interface drivers/firmware could improve power management as well. It's all interlinked. At least rule it out.