Não consigo colocar minha placa wifi no modo monitor

airmon-ng start wlan0 

Found 5 processes that could cause trouble.
Kill them using 'airmon-ng check kill' before putting
the card in monitor mode, they will interfere by changing channels
and sometimes putting the interface back in managed mode

PID Name
497 avahi-daemon
505 NetworkManager
507 wpa_supplicant
511 avahi-daemon
1299 dhclient

PHY Interface Driver Chipset

phy0 wlan0 rtl8723bs unable to detect for sdio 0x024c:0xb723

Newly created monitor mode interface wlan0mon is *NOT* in monitor mode.
Removing non-monitor wlan0mon interface...

WARNING: unable to start monitor mode, please run "airmon-ng check kill"

airmon-ng check kill