On Fri, 14 Dec 2007, Jay Monkman wrote: > On Fri, Dec 14, 2007 at 11:06:20AM -0500, Alan Stern wrote: > > On Thu, 13 Dec 2007, Jay Monkman wrote: > > > > > I'm trying to use a USB audio device on a MPC8349 (PowerPC SoC) > > > system. The processor has a built in EHCI controller. > > ... > > > I don't see anything in dmesg that indicates any real difference > > > between the two cases. > > > > I forgot to mention one other thing. The usbmon log where you attached > > the device directly (no hub) showed the USB controller reporting an > > overcurrent status. Maybe this is just wrong, or maybe the audio > > device is drawing too much power from the SOC. > > The hub I've been using isn't powered, and the device works with > it. So there's definitely enough current on the bus to power just the > device. Could it be that something in the host driver isn't set up > correctly regarding power and that's what's causing the device alone > to fail?
I doubt that the overcurrent indicator is causing the problem, but it does appear to be another bug in either the driver or the controller. Alan Stern - To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
