I have a “desktop” and haven’t installed “TLP”, so I don’t think that’s it. , unless TLP is installed by default on 16.04.
I think that I may have a faulty SATA cable connected to my DVD drive. When you first begin having screen freezes/lockups, you don’t often associate your actions at the exact moment with the lockup - such as using the DVD drive.
When I was doing my recent research on ATA bus errors, several people mentioned tracking the problem down to a faulty SATA cable or a loose cable connection. So it got me to thinking - Yeah, I was using the DVD at the time of the last crash. So now I’m trying to remember if I was using the DVD at the time of the other crashes. I think there’s a good chance that maybe I was. It’s impossible to be 100% sure at this point.
I have a spare SATA cable. I’m going to switch that out on my DVD and go from there.
Jim