I have 3 Macs - a MacBook Pro 15", MacBook Pro 13" & MacBook Air 11".
The 15" stays home all the time, the other 2 are used for mobile usage, so I want to use the 15" for remote video capture or snapshots when I'm not home. I've been using a command-line tool called "imagesnap" which works great from Terminal (and via SSH) and allows me to set up batch files that run in the background.
However, I have a strange issue where usage of the tool triggers the 15" to wake from display sleep but neither of the other 2 Macs display this behavior. I don't want to use any more power than necessary so this is rather annoying.
I'm not interested in debgugging the imagesnap tool itself, I don't think that's the issue. What I want to figure out, though, is what is the best way to determine why one Mac is behaving one way while the other 2 are behaving another? I've looked at the power settings and can't figure out why the 15" display turns on a moment after I snap an image but the other 2 don't - the settings are pretty much identical. I've tried to also run similar configurations of running applications.
Is there something in the log files I can look into? A running process? A configuration difference to compare? Or, in case that doesn't solve it, is there a way to suppress the system from waking the display immediately after snapping an image from the webcam?
you could try checking your settings with
pmset -gin terminal because you have more control there. you might have already solved this one since it's been a year.