I have a Toshiba laptop with and i7 intel, NVIDIA, KDE4-Kubuntu running with acpid. The machine will suspend to ram if idle for 10 minutes automatically using pm-suspend (as reported in /var/log/pm-suspend.log).

$ pm-is-supported
pm-is-supported [--suspend | --hibernate | --suspend-hybrid ]

$ acpitool
Battery status : <not available>
AC adapter : <info not available or off-line>
Thermal info : <not available>

and a ps -ax shows:
55 ? S< 3:14 [kacpid]
56 ? S< 1:35 [kacpi_notify]
57 ? S< 0:00 [kacpi_hotplug]
are running


Suspend and hibernate functions work well manually also using pm-suspend, pm-hibernate, <FN><F3>, selecting suspend or hibernate from Guidance Power Manager or from the "KDE Kickoff Launcher". It will wake with all functions working properly.

Battery status is not recognised by any utility, but this may not be an issue and should probably be a concern for another day.

I've turned PowerDevil "ON" and "OFF". I instruct Guidance Power Manager to suspend in 90 minutes with no activity. I've tried everything I can think of to turn suspend "OFF" or change it's time value for auto-suspend. It seems the GUIs have absolutely NO effect upon power management.

Something is triggering the computer to suspend after 10 minutes of inactivity... not 9 or 11. Where is this controlled? What config file or etc holds this "10 minutes" or triggers this action?

I will be happy to provide any additional information needed to assist in a solution to this issue.

Thank you in advance.

First, you shouldn't use 2 power managers at once, in this case PowerDevil and Guidance. Choose one.
It is possible that a different daemon in Kubuntu is responsible for power management though, which may be doing this. Also, try checking your screensaver settings.

I selected to NOT control power management with powerdevil and also with any other GUIs. I've tried it with all possibilities I know with all GUIs and text based programs/utilities.

The real question is... Where in the system tells the computer to do a "suspend to RAM" in exactly 10 Minutes automatically with no user activity?... Not 15 minutes or 5.

I don't know much about the differences between the various Ubuntu
releases, but this thread might work for you:

http://ubuntuforums.org/showthread.php?t=1301101&page=8

Except that you will need to change the link they tell you to down the
patch from to this:

https://bugzilla.kernel.org/attachment.cgi?id=25669

After you've followed their steps you'll need to boot with the option
"acpi=copy_dsdt". I also use "nohpet".