On Sat, 8 Sep 2012, [ISO-8859-1] Florian W� wrote: > > Hello everybody, > > I am trying to get a USB IO Board running with Debian on Raspberry PI > and other 2.6.+ distributions (e.g. Ubuntu 12.04). > > The board used to run fine with kernel 2.4.+ (e.g. Ubuntu 10.04) - a > Device /dev/ttyACM0 was created and usable. > But with newer kernels no device is created and dmesg tells: > > # dmesg > [ 3.391258] usb 1-1.2: new full-speed USB device number 4 using dwc_otg > [ 8.531474] usb 1-1.2: unable to read config index 0 > descriptor/start: -32 > [ 8.531510] usb 1-1.2: chopping to 0 config(s) > [ 8.532305] usb 1-1.2: string descriptor 0 read error: -32 > The problem seems to be in usbcore, because some descriptors cannot be > read (-32/-EPIPE). Actually this looks more like a hardware/firmware/driver problem. Maybe in the device, maybe in your Raspberry PI. > Has anybody an idea how to get this running? Does the device work when plugged into a regular desktop system? Have you tested it recently under a 2.4 kernel to make sure that combination still works? 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
