Hello, I need some advice how to debug a device, that under Windows presents 2 virtual com ports. Windows .sys. file mentions a "Jungo CDC ACM OBEX Driver". I get the following dmesg output > [ 1700.263981] usb 1-1.4: new full-speed USB device number 10 using > ehci-pci > [ 1700.378186] usb 1-1.4: New USB device found, idVendor=0cad, > idProduct=9011 > [ 1700.378187] usb 1-1.4: New USB device strings: Mfr=1, Product=2, > SerialNumber=0 > [ 1700.378188] usb 1-1.4: Product: Motorola Solutions TETRA PEI interface > [ 1700.378188] usb 1-1.4: Manufacturer: Motorola Solutions Inc. > [ 1745.845550] cdc_acm 1-1.4:1.0: Zero length descriptor references > [ 1745.845555] cdc_acm: probe of 1-1.4:1.0 failed with error -22 > [ 1745.845560] cdc_acm 1-1.4:1.1: Zero length descriptor references > [ 1745.845561] cdc_acm: probe of 1-1.4:1.1 failed with error -22 Adding the device ids and a quirk to cdc_acm.c > .driver_info = NO_UNION_NORMAL, does only suppress the "Zero length" message. What can I do? Details: > T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=03 Dev#= 10 Spd=12 MxCh= 0 > > D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=0cad ProdID=9011 Rev=24.16 > S: Manufacturer=Motorola Solutions Inc. > S: Product=Motorola Solutions TETRA PEI interface > C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA > I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none) > I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none) > Alternative with usbserial # echo '0cad 9011' > /sys/bus/usb-serial/drivers/generic/new_id > [ 2234.761068] usbserial_generic 1-1.4:1.0: The "generic" usb-serial > driver is only for testing and one-off prototypes. > [ 2234.761069] usbserial_generic 1-1.4:1.0: Tell > linux-usb@xxxxxxxxxxxxxxx to add your device to a proper driver. > [ 2234.761070] usbserial_generic 1-1.4:1.0: generic converter detected > [ 2234.761236] usb 1-1.4: generic converter now attached to ttyUSB0 > [ 2234.761249] usbserial_generic 1-1.4:1.1: The "generic" usb-serial > driver is only for testing and one-off prototypes. > [ 2234.761250] usbserial_generic 1-1.4:1.1: Tell > linux-usb@xxxxxxxxxxxxxxx to add your device to a proper driver. > [ 2234.761250] usbserial_generic 1-1.4:1.1: generic converter detected > [ 2234.761293] usb 1-1.4: generic converter now attached to ttyUSB1 however: $ miniterm.py /dev/ttyUSB1 Traceback (most recent call last): File "/usr/bin/miniterm.py", line 878, in <module> main() File "/usr/bin/miniterm.py", line 834, in main serial_instance.open() File "/home/max/.local/lib/python2.7/site-packages/serial/serialposix.py", line 311, in open self._update_dtr_state() File "/home/max/.local/lib/python2.7/site-packages/serial/serialposix.py", line 605, in _update_dtr_state fcntl.ioctl(self.fd, TIOCMBIS, TIOCM_DTR_str) IOError: [Errno 22] Invalid argument Thanks! -- 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
