I have regular wireless disconnecting with the following message in dmesg ieee80211 phy0: wlan4: No probe response from AP <mac address> after 500ms, diconnecting. my network interface: Bus 002 Device 003: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter driver: rt2800usb I red a lot of solution in internet 1 / iwconfig wlan4 power off: nothing changes 2/ rmmod rt2800usb && modprobe rt2800usb nohwcrypt=Y: i can not do that because rt2800usb is a built in module. 3/ sudo echo “options mac80211 max_probe_tries=20″ > /etc/modprobe.d/mac80211.conf: the same as the previous. How can i modify builtin module parameter ? any other idea ? Any help will be very appreciated. It is very important for me.