I have similar problem. It looks like whenever the laptop goes to sleep or turned off it will go crazy for a few minutes, then goes back working normally until next sleep or shutdown. Then I realized that it was not because the machine goes to sleep or turned off, it was because the display being turned off. Conversely, if the display is never turned off, that problem will never happen. So what I did was simply have the energy setting to never turn off display and just set the brightness to zero when I do not use it. This seems does not the lifespan of the display.