How can I tell the difference between the entire computer sleeping and only the display sleeping?
I'm trying to diagnose sleep problems, and one of the basic things I need to know is the difference between these two kinds of sleep modes. I can't rely on the times I set in the settings since that is what I'm trying to debug.
I have a 13" Macbook Air late 2010, if that makes any difference.
Things I thought might help:
- Trackpad move vs. trackpad click. I've noticed that when I force the computer to sleep via the Apple menu, it's not enough to move around the mouse via the trackpad... I must press down on the trackpad or another key.
- Caps Lock light: If I leave caps lock on for testing purposes, sometimes I will see the light turn off, while other times it stays on. I thought that perhaps this could tell me the difference between the two.
- The Apple logo on the back side of the laptop, although its light seems to go off in both cases, so that doesn't help
- Plugging in a USB device which has a light, which indicates when the computer is supplying it power. The light seems to shut off when in sleep mode, but stays on when the display is sleeping. I'm not sure if this is a reliable method, though
The problem with the first two methods is that I was able to recreate a situation where the caps lock key remains on, but the trackpad mouse move does not wake the computer.
Are there any reliable ways to know if the entire computer has gone to sleep or not?