On Thu, Jul 19, 2012 at 10:42:23AM -0400, Alan Stern wrote: > The same is true for external ports if they are marked as > non-removable. For example, consider a compound keyboard/mouse device > with a built-in hub. The connections from the keyboard and the mouse > to the hub are internal and not removable. Alan, is there a way to know whether a hub is part of a compound device by looking at the device descriptors? Also, what do you propose we do with empty ports on the built-in hub? I know some keyboards expose those extra ports on the outside of the keyboard, but others may have internal unconnectable ports. I think the safest thing to do is leave ports on built-in hubs powered on, since we can't get any ACPI information for them. Further, do devices like BMCs look like a compound device? I know some of them will disconnect the storage or CD drives when they're not being used, which may break your assumption that devices behind a hub in a compound device cannot be disconnected. Sarah Sharp -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
