I also have the same issue as you, but it's just the Linux environment. You'll get nothing out of it for the moment, except a moving cursor...Is Linux actually working on your New 3DS? I've got an N3DSXL on the newest firmware (Luma 9.1.7, bootstrap9 and well, the latest 3DS system version), my problem is that Im unable to change the input mode even while pressing select plus the 'weston environment(?)' there im unable to start the terminal, did you fixed the issue, and if so could you maybe upload your latest build, please?
EDIT
Or does your WiFi works on your 3DS with Linux?