Ansgar Burchardt writes ("Bug#877024: modemmanager should ask before messing with serial ports"): > It's not useless. At least not when using UMTS via USB dongles which I > would guess more people use than ham radio. (Some of these USB dongles > also emulate network cards and provide a DHCP server instead IIRC.)
Right. These kind of dongles are very common. My last one (which died recently) was one. Also, AIUI modemmanager contains code to do things with the new-style MBIM dongles (which can also be done with the cli tools in mbim-utils). But I definitely wouldn't suggest disabling its ability to work with AT-command modems, as they are still being sold.[1] Ian. [1] I think. I tried to buy one and ended up with one which is switchable between MBIM and Hilink instead.