| openSUSE-Dokumentation Kapitel 1. Getting Started with the KDE Desktop / 1.14. Controlling Your Desktop's Power Management with KPowersave | ||||
|---|---|---|---|---|
 | 1.13. Managing Passwords with KWallet Manager | 1.15. Displaying, Decompressing, and Creating Archives |  | |
| openSUSE-Dokumentation Kapitel 1. Getting Started with the KDE Desktop / 1.14. Controlling Your Desktop's Power Management with KPowersave | ||||
|---|---|---|---|---|
| 1.13. Managing Passwords with KWallet Manager | 1.15. Displaying, Decompressing, and Creating Archives | | |
KPowersave is a small panel applet which allows you to control all power management functions supported by your system with just a few clicks on the desktop. You can track power consumption and CPU frequency, choose another power management scheme to match the tasks your system is facing, and send your system into suspend or standby state by just clicking the applet.
For a quick check of how your system is doing and which power management measures have been taken, left-click the KPowersave panel icon.
Apart from telling you at which speed your CPU or CPUs are running, KPowersave provides detailed information on the power saving mode your system is in:
Power management settings can be tied in to certain requirements your system needs to meet. This is done by assigning schemes.
Some hardware supports the dimming of your monitor's brightness as a means to save power.
Whenever you need to cut down power consumption and you do not need to run your system continuously, consider using one of the three suspend modes supported by openSUSE:
All your data and the session data is saved to disk before the system is laid to rest. It is thus protected against data loss should you loose power in the meantime. Waking the system up again is much faster than booting it from scratch.
All your data and the session data is saved to RAM. Bringing the system up again is faster than restoring a session from disk.
Your data is written to RAM, the display is shut down, but the system keeps running.
Whether all of these are available or just one or two depends on the capabilities of your hardware. To trigger your system to enter one of these modes, right-click the panel icon and select the respective option.
Power management schemes let you adjust various power management parameters to the requirements of certain typical situations you are facing when using your machine. KPowersave ships with a set of four preconfigured schemes which you can adjust to your needs. To switch schemes with KPowersave just right-click the panel icon and select . The following schemes are available:
Keep your machine running with full power and full speed to achieve maximum performance.
Apply any measure that makes sure your machine runs as quietly as possible.
Disable any display power management and screen savers to make sure that your presentation is not interrupted by a blanked display or such like.
Apply aggressive power management methods to make sure that your machine runs as long as possible when put on battery power instead of AC power.
KPowersave provides various types of feedback upon certain events. To open the notification configuration dialog, either right-click the panel icon and select or select ++.
KPowersave supports several different types of notifications that can be associated with different events. The most prominent of them are:
Select one of the KDE system sounds to be played.
Specify the full path to a file where KPowersave should log to.
Specify the full command for a program that should be executed.
Have KPowersave throw a pop-up window.
Have KPowersave throw a passive window that does not pull focus.
Basically, there are two different ways to configure KPowersave notifications. Either use the to toggle the notification status of multiple events at once or use the settings to configure them one by one.
The KPowersave settings dialog comprises two different groups of settings:
Detailed configuration for all power management schemes supported by KPowersave.
Miscellaneous options related to KPowersave's behavior, such as screen locking, auto-suspend, notification and autostart behavior.
Power saving schemes in KPowersave offer controls to:
Enable or disable a screen saver
Enable or disable display power management
Change the brightness of your display to reduce power consumption
Enable or disable auto-suspend of your machine
Enable or disable notifications KPowersave events
You can modify any of the preconfigured schemes, but you cannot delete them or add new ones.
To configure a KPowersave scheme, proceed as follows:
Right-click the panel icon and select +.
Select the scheme you want to modify.
Open the tab and determine whether your scheme requires specific tuning of the screen saver settings. If using your machine in presentation mode, you should consider disabling the screen saver altogether. If you want your display to automatically enter powersaving modes after a certain period of time, activate and enter the number of minutes after which the display should use power management.
If your display hardware supports reducing the brightness for power saving reasons, open the , select and set the brightness value.
If you want your machine to automatically suspend (to disk) after a certain period of time, open the tab, select and determine when the machine should automatically enter suspend. To avoid problems with applications whose state cannot be properly restored when your session is resumed, maintain a blacklist of these applications via . If any of these applications is running, KPowersave does not automatically suspend your desktop.
If you want KPowersave to work quietly, turn of notifications for powersave events by entering the tab and selecting .
Click to apply your settings and leave the configuration dialog.
If you want the screen to be locked before the system enters suspend or standby, activate the control and choose a screen saver. A locked screen might keep unauthorized users off this machine.
If you want your machine to enter suspend after a certain period of idleness, be aware that several applications can cause problems with auto-suspend. Use a black list to keep KPowersave from triggering a suspend action when one or more of the listed applications are running.
To configure notifications, select and proceed as described above. The dialog described here is exactly the same as if you had right-clicked the panel icon and selected .
To configure KPowersave to be automatically started on login, select . If you select , you will not be asked whether KPowersave should be automatically started when you exit a session that had not previously included KPowersave in the list of tasks to be started automatically.
