Is it the Nunchuk that it doesn't detect or the MotionPlus? MotionPlus detection is still somewhat a problem; you often have to plug/unplug the Nunchuk and/or the M+ (if not built-in) several times before the game detects it, and it has to be unplugged before starting the game.
The udev rule should work (I should know, I tried and edited it when working on the PR). Make sure you have put it to the correct location and disconnected/reconnected your DolphinBar (or the rules aren't active).
edit: I just saw your message about the Wiimote not being detected with a Nunchuk. I'll try this later and see if I can reproduce it.
The udev rule should work (I should know, I tried and edited it when working on the PR). Make sure you have put it to the correct location and disconnected/reconnected your DolphinBar (or the rules aren't active).
edit: I just saw your message about the Wiimote not being detected with a Nunchuk. I'll try this later and see if I can reproduce it.