G3TDJ

The apparent anomalies with connman may be because there are conflicts between the network configuration stored in /etc/network/interfaces and the connman configuration. Connman does not use /etc/network/interfaces to store config.

Interestingly I inserted a new D-Link DWA-131 wireless dongle with a rtl8192SU chipset into my kiwisdr and this appears as wlan2 with an "ifconfig -a" command. (This chipset works well with the firmware-realtek driver)

I chased this down to a udev rule that seemingly creates a new wlan interface number each time a new mac address is encountered.

In /etc/udev/rules.d I can see three udev rules, one for each of the three wireless dongles which have successfully worked in the kiwisdr

I've compiled a new kernel module for a rtl 8192EU chipset, so using the "theory" above this might just appear as wlan3 when the new dongle is inserted - that's if the new 8192eu.ko module is accepted !

gr-kiwisdr is working well here Christoph in Linux Mint 19.1

Built exactly to github instructions and tuned to DDK2 Weather RTTY on 4583 KHz as shown in the attached gr-kiwisdr.jpg

many thanks

Andy G3TDJ