On Mon, Jul 20, 2020 at 01:36:58AM +0200, David Guillen Fandos wrote: > Hey there again! > > I managed to get a PCAP capture for this. Note that NetworkManager was > running and actively probing the ttyACM* devices for a modem, hence why > you can see "AT\n" commands being sent to the four devices. > > As you can also probably see is that the device currently ignores any > control requests (like Set Line Coding). > > Hope it can help your debugging. What's the story with all the -EPROTO errors on the bulk endpoints in the trace? It looks like your device hasn't enabled a bunch of endpoints that are supposed to be active. Alan Stern
