Before using airmon-ng on a network interface, you now have to do :
airmon-ng check kill This is essential in order to be able to put any interface in monitor mode, but it stops the service network-manager.
As a result, having two network interfaces, i can't use the other interface for "normal" internet use because network-manager is off. But if i turn it on again, then the first one goes out of monitor mode.
Is there a workaround to solve this problem ? How can i use one wireless interface for "normal" internet and use the aircrack-ng suite with the other?