The ID_MM_DEVICE_IGNORE udev tag is being ignored in strict filter mode, I'm trying to change that in this MR for the next MM release: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/merge_requests/138
Iain, could you let me know the full lsusb -v output of that specific DMR radio? I need to understand whether the device is wrongly claiming AT protocol support in the ttyACM interface or not. -- Aleksander https://aleksander.es