I'm wondering why this happened - out of nowhere (means in the middle of my work and without any interaction with network settings) Ubuntu disconnected me from wifi network. After some digging I figured the password in network settings for WPA/WPA2 was changed to some strange string, no idea where it came from. After entering the right password and clicking OK it doesn't work, and when I look back in the settings, there's (the same?) strange string where password's supposed to be. It seems quite random, like memory dump. No idea why this is happening and how do I put the password in there.