Hi Bjørn, On 07/03/16 09:38, Bjørn Mork wrote: > Since the modem definitely works in MBIM modem, it's more likely that > there is something interfering with the MBIM control channel in Linux. > For example some unknown process reading from the character device, or > something sending unknown commands to it which makes it lock up. We > have seen examples of both those problems in the past. > > Use "lsof /dev/cdc-wdm0" to make sure there are no unwanted listeners. > > Make sure nothing probes the device for any other protocol than MBIM > (some Sierra Wireless Qualcomm based devices are for example known to > switch control protocol to whatever probes it first, regardless of USB > descriptors saying MBIM).
At the moment I'm trying to capture the usb traffic starting with the initialization of the cdc_mbim module, while not loading any modules not needed. I'm somewhat confused however about the relation between the cdc_mbim and the cdc_ncm driver. It is loaded when inserting the cdc_mbim module via modprobe. Should I load the huawei_cdc_mbim module (for which you posted the patch with the proper ID earlier), too? Andreas
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