I have been experiencing some odd problems with Mint 18.x (these issues are also in Ubuntu 16.04, so I believe it is an upstream problem). For a little more info, 17.x was rock solid. Since updating I have had video issues with a PC connected via a KVM switch. When I toggle to another computer, the 18.1 machine completely shuts off video output. When I toggle back to it, the video display is blank. This is not a screensaver or power saving issue. I finally found a work around. Prior to switching, I open a terminal window and enter: xrandr --output VGA-1 --auto Then, when I switch back to it, I simply press the enter key and video output is restored. I know this is clunky, but it works until I find a better solution. The other issue is a laptop that WiFi comes and goes randomly. I am not talking about dropped connections, rather the wireless adapter is not detected. Boot the laptop and WiFi is connected. A short time later it disconnects. Some times it comes back on it's own, other times it requires logging out or rebooting. I recently decided to switch to another Debian based distro, MX-16 on the desktop and LMDE 2 (Betsy) on the laptop until I can find solutions for these minor, but irritating, 18.x problems.