On Mon, Dec 07, 2009 at 01:15:52PM +0100, Josip Rodin wrote: > Hi, > > I happen to have two Huawei USB mobile broadband modem devices from two > different providers that act like this when plugged in simultaneously > into my machine currently running Linux 2.6.31.6: > > Bus 001 Device 007: ID 12d1:1003 Huawei Technologies Co., Ltd. E220 HSDPA Modem / E270 HSDPA/HSUPA Modem > Bus 002 Device 008: ID 12d1:1003 Huawei Technologies Co., Ltd. E220 HSDPA Modem / E270 HSDPA/HSUPA Modem > > usb 1-1: generic converter now attached to ttyUSB0 > usb 1-1: generic converter now attached to ttyUSB1 > usb 2-2: generic converter now attached to ttyUSB2 > usb 2-2: generic converter now attached to ttyUSB3 > > That's all acceptable. However, the last one plugged in overrides the > previous one's /dev/serial/by-id/ entries because both of them use the > same names: > > usb-HUAWEI_Technology_HUAWEI_Mobile-if00-port0 > usb-HUAWEI_Technology_HUAWEI_Mobile-if01-port0 > > Is there any way some sort of a more unique identifier could be made for > these so that I can keep using /dev/serial/by-id/ rather than semi-random > /dev/ttyUSB* numbers? Especially because these two devices are really > different, one is model E180 and the other is model E160, they have > different SIM cards/ISPs so they must have different IMEIs, etc. > > I also have an internal device like this that creates these kinds of > symlinks: > > usb-Ericsson_Ericsson_F3507g_Mobile_Broadband_Minicard_Composite_Device_3541430202471020-if01 > usb-Ericsson_Ericsson_F3507g_Mobile_Broadband_Minicard_Composite_Device_3541430202471020-if03 > usb-Ericsson_Ericsson_F3507g_Mobile_Broadband_Minicard_Composite_Device_3541430202471020-if09 > > That 16-digit number looks good... it seems to come from the "iSerial" > variable (lsusb). Sadly this variable is missing on the two Huawei devices. > Can something be done? I suggest asking the company to put serial numbers in the devices. Other than that, if there is no way to detect a "unique" device, you are out of luck, sorry. good luck, greg k-h -- 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
