Spent all day trying to fix my intermittently failing Wi-Fi connection on Linux. Error codes for wpa_supplicant are entirely unhelpful. -_-

Sometimes I have problem with wifi connection. I use ubuntu with network-manager and it's sometimes can't find my access point.
In order to find it, I'm running the command sudo iwlist [interface] scan, and it's making the netwotk manager to find the access point and reconnect