https://www.raspberrypi.org/documentati ... /README.md
Forgive my ignorance, but I need some clarification: Does this mean external USB 3.0 hubs with USB 1.0 ("full speed") devices plugged into the Pi's 3.0 slots may have trouble? Or that the USB 3.0 ports on the Pi are considered "hubs" and that a USB 1.0 ("full speed") device plugged directly into the Pi's 3.0 slots may have trouble?1. Interoperability between the Raspberry Pi and USB 3.0 hubs
There is an issue with USB 3.0 hubs in conjunction with the use of full- or low-speed devices (most mice, most keyboards) and the Raspberry Pi. A bug in most USB 3.0 hub hardware means that the Raspberry Pi cannot talk to full- or low-speed devices connected to a USB 3.0 hub.
USB 2.0 high-speed devices, including USB 2.0 hubs, operate correctly when connected via a USB 3.0 hub.
Avoid connecting low- or full-speed devices into a USB 3.0 hub. As a workaround, plug a USB 2.0 hub into the downstream port of the USB 3.0 hub and connect the low-speed device, or use a USB 2.0 hub between the Pi and the USB 3.0 hub, then plug low-speed devices into the USB 2.0 hub.
In other words, does "hub" refer to the ports on the Pi itself?
Extra credit: Does a USB sound device contain its own "hub"?
(Sorry just a little foggy on the terminology.)