How to prevent Xubuntu from suspend?

Question

Apparently, Xubuntu is totally unable to wake up. So when it goes to sleep, for whatever reason, you lose all usaved work. No Ctrl+Alt+F1, nothing. It is there, the machine is on, but the only thing you can do is a hard shut down.

After various unsuccessful attempts at correcting the problem, I just turned off all power management options.

But it still goes to sleep/death after 45 minutes, the default setting.

What can I do to just turn off all sleep functions?

I'm using Xubuntu 16.04 on a Intel NUC. Before that I was using plain Ubuntu on this same machine (but it took too much RAM) and it could wake up without any problem.

Caffeine

You could give caffeine a try - quoting the launchpad page:

A status bar application able to temporarily prevent the activation of both the screensaver and the "sleep" powersaving mode.

Comments

[jarno]

Did you make bug reports about the issues?

[yPhil]

@Jarno The problem has already been reported bugs.launchpad.net/ubuntu/+source/linux/+bug/1581249

[yPhil]

I'd rather uninstall something :) BTW I removed "light locker" but no luck. Anybody here knows what process is actually handling the suspend?

[djangofan]

This isn't helpful if your XUbuntu is a headless node.