Several weeks ago, I upgraded my CentOS instance, forming a part in the eight-boot setup on the Lenovo G50 laptop, to the latest release, version 7.4. Remember? Well, everything was peachy, including the networking. Then, a couple of reboots later (and more importantly, full system power offs), CentOS 7.4 would no longer recognize the Wireless interface! The Realtek RTL8723BE module was not being loaded anymore!

I decided to explore and troubleshoot this in detail, because I hate seemingly random issues, especially since it worked once, it should continue working. Intermittent problems are the worst. Let's see if we can understand the problem and fix it. After me.