I'm on a Compaq 615 and it's fan is loud as hell. Not much you can do about that but I'm trying to keep the CPU/GPU as cool as possible.

This is what Powertop has to say:

If I change all of them to "good", the changes don't survive a reboot.

Also, upon exiting Powertop I get this:

Loaded 8 prior measurements
Cannot load from file /var/cache/powertop/saved_parameters.powertop
Leaving PowerTOP

I added the line to the "grub"-file as suggested here

Upon closing gedit I get this:

(gedit:2728): Gtk-WARNING **: Attempting to store changes into `/root/.local/share/recently-used.xbel', but failed: Datei »/root/.local/share/recently-used.xbel.9CIMAW« konnte nicht angelegt werden: Datei oder Verzeichnis nicht gefunden

The part in German says: Couldn't be created: File or directory not found.