Hi, do you mean that it should never had been working (past situation) or now it should not (current state)? I ask this because it was working... now the doubt you make me it is that for some unknown reasons the device got something changed in the firmware or lost some configurations... The strange thing is that to check this I bought another device still from Arduino and also that it's not working/detected by cdc_acm driver. In this case the dmesg output is different. See Below. I CC'ed also johan since he asked the lsusb -v output and to avoid two people "working" on the same matter... The following is the dmesg and lsusb -v output of Arduino ISP (http://arduino.cc/en/Main/ArduinoISP) ******************************************************* [50765.439538] usb 1-1.3: new low-speed USB device number 7 using xhci_hcd [50765.531655] usb 1-1.3: New USB device found, idVendor=2341, idProduct=0049 [50765.531660] usb 1-1.3: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [50765.531663] usb 1-1.3: Product: ArduinoISP as root I typed echo '0x2341 0x0049' > /sys/bus/usb/drivers/cdc_acm/new_id dmesg additional output [50823.826785] cdc_acm 1-1.3:1.0: Zero length descriptor references [50823.826799] cdc_acm: probe of 1-1.3:1.0 failed with error -22 lsusb -v output Bus 001 Device 007: ID 2341:0049 Arduino SA Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass 255 Vendor Specific Class bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x2341 Arduino SA idProduct 0x0049 bcdDevice 1.04 iManufacturer 0 iProduct 2 ArduinoISP iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 18 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 40mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 0 bInterfaceProtocol 0 iInterface 0 Device Status: 0x0000 (Bus Powered) ******************************************************* Thanks again for your support! If I had imagined it would have been so fast... :-) /r0b On gio, 2015-02-19 at 09:38 +0100, Oliver Neukum wrote: > On Thu, 2015-02-19 at 09:31 +0100, Roberto Bianchi wrote: > > Wow! What a support! > > > > *************************************************************** > > Bus 001 Device 005: ID 03eb:2ff7 Atmel Corp. > > Device Descriptor: > > bLength 18 > > bDescriptorType 1 > > bcdUSB 1.10 > > bDeviceClass 0 (Defined at Interface level) > > bDeviceSubClass 0 > > bDeviceProtocol 0 > > bMaxPacketSize0 32 > > idVendor 0x03eb Atmel Corp. > > idProduct 0x2ff7 > > bcdDevice 0.00 > > iManufacturer 0 > > iProduct 1 Arduino USB-Serial DFU > > iSerial 0 > > bNumConfigurations 1 > > Configuration Descriptor: > > bLength 9 > > bDescriptorType 2 > > wTotalLength 27 > > bNumInterfaces 1 > > bConfigurationValue 1 > > iConfiguration 0 > > bmAttributes 0x80 > > (Bus Powered) > > MaxPower 100mA > > Interface Descriptor: > > bLength 9 > > bDescriptorType 4 > > bInterfaceNumber 0 > > bAlternateSetting 0 > > bNumEndpoints 0 > > bInterfaceClass 254 Application Specific Interface > > bInterfaceSubClass 1 Device Firmware Update > > bInterfaceProtocol 2 > > iInterface 0 > > Device Firmware Upgrade Interface Descriptor: > > bLength 9 > > bDescriptorType 33 > > bmAttributes 3 > > Will Not Detach > > Manifestation Intolerant > > Upload Supported > > Download Supported > > wDetachTimeout 0 milliseconds > > wTransferSize 3072 bytes > > bcdDFUVersion 1.00 > > Device Status: 0x0001 > > Self Powered > > ******************************************************************* > > That is a DFU device. It cannot work with CDC-ACM. Did you mean > to use it with CDC-ACM after uploading firmware? If so, I need > the descriptor in that state. > In the current state the device lacks endpoints. It cannot > possibly work with CDC-ACM. > > Regards > Oliver > > -- 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
