Novell LINUX ENTERPRISE DESKTOP 10 SP2 - DEPLOYMENT GUIDE 08-05-2008 Deployment Manual page 568

/etc/sysconfig/powersave/disk
This configuration file controls the actions and settings made regarding the hard
disk.
/etc/sysconfig/powersave/scheme_*
These are the various schemes that adapt the power consumption to certain deploy-
ment scenarios. A number of schemes are preconfigured and can be used as they
are. Custom schemes can be saved here.
28.5.2 Configuring APM and ACPI
Suspend and Standby
There are three basic ACPI sleep modes and two APM sleep modes:
Suspend to Disk (ACPI S4, APM suspend)
Saves the entire memory content to the hard disk. The computer is switched off
completely and does not consume any power. This sleep mode is enabled by default
and should work on all systems.
Suspend to RAM (ACPI S3, APM suspend)
Saves the states of all devices to the main memory. Only the main memory continues
consuming power. SUSE Linux Enterprise does not generally support this sleep
mode although you can use it for quite a number of machines.
This sleep mode is enabled by default, but it is only executed if the current machine
is listed in a database as capable of supporting this mode. This database is contained
in the /usr/sbin/s2ram binary provided by the suspend package.
To modify the default parameters (for example, to generally disable the suspend
to ram sleep mode or to force it even for machines not listed in the database),
find more information about available options in the /etc/sysconfig/
powersave/sleep configuration file.
To learn more about the s2ram binary, refer to the README files in /usr/
share/doc/packages/suspend.
Standby (ACPI S1, APM standby)
Switches some devices off (manufacturer-dependent).
552 Deployment Guide