When connecting a chip board via USB (similar to RaspPI -> https://getchip.com/), plasma-nm continues to try connecting to it, and gets stuck on acquiring network address. It never gets a network address (and I don't want it to, I just want to power it, or e.g. flash it) , however the plasma-nm applet becomes non-responsive. In this case, plasmashell is consuming all the memory and eventually all the swap on the machine, and eventually plasmashell gets killed by the OOM. Each time I plug in one of these devices it shows up as a new wired connection, so I cannot get plasma-nm to remember the device settings and disable the connection. The USB dmesg output is as follows: [121719.097187] usb 3-7.2: new high-speed USB device number 13 using xhci_hcd [121719.185904] usb 3-7.2: New USB device found, idVendor=0525, idProduct=a4aa [121719.185907] usb 3-7.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [121719.185907] usb 3-7.2: Product: CDC Composite Gadget [121719.185908] usb 3-7.2: Manufacturer: Linux 4.4.13-ntc-mlc with musb-hdrc [121719.196430] cdc_ether 3-7.2:1.0 usb0: register 'cdc_ether' at usb-0000:00:14.0-7.2, CDC Ethernet Device, fa:f6:32:41:11:a5 [121719.196731] cdc_acm 3-7.2:1.2: ttyACM0: USB ACM device
Does it work if you manually create a wired connection and restrict it to the MAC address of your chip board device?
Is this still a problem with latest Plasma 5.19?
No, not a problem any more. Seems like the latest plasma deactivates the connection after a while. Closing.