I guess I am showing my age.
Heh. I was just teasing: I have soldered 90volt neon indicators for computers (not exactly "PCs" in the current sense) before, but it was quite a while ago ...
How do I disable Suspend to Disk
I am running Kubuntu 8.04, so it's KDE, not gnome, and my distro is a year older than yours, so I think you'll have to search and test things out for yourself (I did try for you, briefly).
But I think it is defaulting to no activity for 10min -> "screensaver", then, later, with no user input, it's going to "Suspend". I think you need to disable this action, because it isn't working properly (and, credit to the developers, it's difficult to get it right, for all the hardware that's out there).
As I said, your distro is newer than mine, but perhaps you now know where to start searching for a solution.
I don't have an icon to control this, but my distro doesn't do this, so perhaps this is not surprising.
Maybe try this: http://linux.derkeiler.com/Mailing-L.../msg01700.html
If / when you find the solution to disabling suspend, please
post it here, because one of these days I expect I'll need to upgrade, and I'll want to know how to disable this nonsense.
[Edit:] Otherwise, please start a new thread titled "How to disable suspend /hibernate in gnome?"
You'll get a better response to your question.