I've never had an issue with going to Energy Saver and changing "Turn display off after" to Never.
Is the going to sleep truly random? Do you get the screen saver first? If you aren't seeing the screen saver, the sleeping may actually be an issue with the lid sensor - possibly due to a nearby magnet or some hardware issue.I had that in the past when I inadvertently set the MBP on top of an iPad (in case).
Is the going to sleep truly random? Do you get the screen saver first? If you aren't seeing the screen saver, the sleeping may actually be an issue with the lid sensor - possibly due to a nearby magnet or some hardware issue.I had that in the past when I inadvertently set the MBP on top of an iPad (in case).