It could also be a driver problem for rtl8191su and therefor r8712u. There seems to be a bug in the system with the USB connection and the current distribution.Įvery time I remove the usb mouse and keyboard, the wlan usb adapter is no longer activated. It looks like there is a start problem with usb connectors of the Pi. Shutdown the stream and start Raspberry Pi and it works nice, but if I do this and remove a usb mouse and keyboard it won‘t connect with the wifi. My WLAN connected after sudo killall wpa_supplicant You may have another wpa_supplicant process already running or the file was left by an unclean termination of wpa_supplicant in which case you will need to manually remove this file before. rvice: systemctl status rviceįailed to initialize control interface 'DIR=/var/run/wpa_supplicant GROUP=netdev'.

I tried already to shut down the power save mode of the wlan adapter: post-up iw dev wlan1 set power_save off The internal WiFi adapter in my Raspberry Pi 3 b+ is a broadcom and my external WiFi adapter is a Realtek RTL8191SU. My /etc/network/interfaces contains: source-directory /etc/network/interfaces.d But after sudo reboot the wifi connector is visible after typing sudo iwconfig in the terminal. I can‘t see the interface of the additional connector after plugging my Raspberry Pi out of power or use sudo poweroff for save shutdown. I plugged an additional wifi connector in my Raspberry Pi 3B+.

Raspberry pi zero wlan config