Pasi Kärkkäinen <pasik@xxxxxx> writes: > After playing with it for a while I got this: > > [ 1082.972880] cdc_ncm_setup: huawei_cdc_ncm 3-1:1.1: dwNtbInMaxSize=262144 dwNtbOutMaxSize=32768 wNdpOutPayloadRemainder=2 wNdpOutDivisor=4 wNdpOutAlignment=4 wNtbOutMaxDatagrams=0 flags=0x1f > [ 1082.972893] cdc_ncm_setup: huawei_cdc_ncm 3-1:1.1: Using default maximum receive length=32768 > [ 1082.973281] cdc_ncm_setup: huawei_cdc_ncm 3-1:1.1: Setting NTB format to 16-bit failed > > .. which looks to be related.. Yes, that is what I expected after thinking long enough to realize that I could just read this out of the usbmon dump you provided. Thanks a lot for all your help providing extremely useful debug info here. This helped fixing (soon, anyway :-) a nasty bug, hitting only a few devices. I still don't know for sure, but I do hope this bug is the real cause of the problems you are having. I'll send you a patch for testing as soon as it is ready. Bjørn -- 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