Linus Walleij <linus.ml.walleij@...> writes: > > 2011/9/11 Graeme Gill <graeme2@...>: > > One of the users of my software is getting the following error > > message on Debian GNU Linux Squeeze: > > > >> Product: Datacolor Spyder3 > >> usb 3-2: Manufacturer: ColorVision Inc. > >> usb 3-2: usbfs: USBDEVFS_CONTROL failed cmd mtp-probe rqt 128 rq 6 len 1024 > >> ret -84 > >> usb 3-2: USB disconnect, device number 38 > >> usb 3-2: new full speed USB device number 39 using uhci_hcd > >> usb 3-2: New USB device found, idVendor=085c, idProduct=0300 > >> usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > > > > (I've had this sort of device working OK on various version of Red Hat) > > > > Can anyone comment on the likely reason for this ? > > This is caused by libmtp device probing. Here is the code, > see probe_device_descriptor() here: > http://libmtp.git.sourceforge.net/git/gitweb.cgi? p=libmtp/libmtp;a=blob;f=src/libusb-glue.c;hb=HEAD > > Most probably because it goes as far as to check the > "OS descriptor" like this: > ret = usb_get_descriptor(devh, 0x03, 0xee, buf, sizeof(buf)); > > I really want to avoid probing the wrong devices, can you provide an > lsusb -v for this device? > > Yours, > Linus Walleij > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@... > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Yup, removing libmtp solved the problem for me. Bus 007 Device 006: ID 085c:0300 ColorVision, Inc. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.00 bDeviceClass 255 Vendor Specific Class bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x085c ColorVision, Inc. idProduct 0x0300 bcdDevice 1.06 iManufacturer 1 ColorVision Inc. iProduct 2 Datacolor Spyder3 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 25 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 4 Monitor Spyder bmAttributes 0x80 (Bus Powered) MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 0 bInterfaceProtocol 0 iInterface 5 EP1 Int Pipe Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 10 Device Status: 0x0000 (Bus Powered) -- 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
