As a pilot for a potential one-on-one program, my school has installed Linux on some Dells that are a couple of years old, and have placed a few of us in charge of setting up/running them.  They are running Qiana (Linux Mint v. 17) with Cinnamon 2.2. One day, the laptop began refusing to connect to wifi.  In the network settings menu, the airplane mode switch was turned to On.  I slid it to Off and closed the menu.  I still couldn't connect.  Returning to the menu, I discovered, much to my chagrin, that airplane mode had turned back on.  Also, regardless of the indicated status of airplane mode, the Wireless switch only flips to On for a split second before reverting to Off.  This problem has persisted through several reboots.Getting on the internet (on a different computer of course), we discovered that this is a (relatively) common problem on similarly-configured Linux machines.  However, none of the solutions given either apply to our computer or simply don't work.  For instance, we tried running   sudo rfkill unblock allin terminal, which hasn't changed anything at all.  There are no hardware switches (such as Fn or buttons on the side of the laptop) to adjust.  What can we do to solve this problem?
Linux Mint Stuck In Airplane Mode
linux mint;wifi