On Tue, 6 Jan 2015, vichy wrote: > I use keyboard, it should be default support runtime suspend, for > testing runtime suspend like the attach log. > insert related modules, change related suspend parameters. > > But I cannot see the keyboard go to suspend even I force autosuspend as 0. > is there any other way to trigger runtime suspend immediately instead > of waiting kernel judge it is idle for a while? There may be other reasons why the keyboard does not get suspended. For example, it may not support remote wakeup. What does "lsusb -v" show? And what does usbmon show? 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