On Thu, 20 Sep 2012, Ming Lei wrote: > This patch sets hub device's default autosuspend delay as 0 to > speedup bus suspend, see comments in code for details. The explanation in the comments assumes that the only reasons for hubs to wake up are because of a connect change or a wakeup request from a child. This is not correct. Hubs can also be woken up by the user. Have you tried running lsusb on a system with several USB devices attached to the same hub and the autosuspend delay set to 0? It's a mess. I think it would make more sense to set the autosuspend delay to something more like 50 or 100 ms. Maybe even as low as 20. But 0 seems too small. Alan Stern -- 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
