On Wed, Jan 11, 2012 at 01:38:16PM -0500, Alan Stern wrote: > On Wed, 11 Jan 2012, Sarah Sharp wrote: > > > Hi Alan and Matthew, > > > > How does the current mass storage suspend work? From my reading, it > > will suspend the device between SCSI commands. > > That's right. > > > Does the current implementation do anything with remote wakeup? For > > example, can an empty storage device signal a remote wakeup when new > > media is inserted? > > No; the USB Mass Storage specs say nothing about remote wakeup and > usb-storage doesn't require it. I haven't heard of any mass-storage > devices that would send wakeup requests. Ok, that's what I thought. Some folks were concerned about bad system power management they have been seeing, and they were claiming the host didn't need to poll an empty CD drive if the USB CD drive advertised remote wakeup in its descriptors. Now I can tell them it's simply not true. 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
