Features of GNOME Power Manager
GNOME Power Manager is a GUI applications and a session daemon as well. It is a GUI since it provides a configuration program which can help the user set Power Management (PM) parameters. It is a daemon since it also provides a back-end program monitoring various events
1. Monitor and show battery status.
2. Trigger an action when lid is closed.
These actions contain Do Nothing, Shutdown, Blank Screen, Suspend, Hibernate
3. Set CPU power consuming policy.
Two classes:
ondemand, the kernel can adjust the frequency automatically according to the system load.
performance, the system always run in the maximum performance.
4. Set power button policy.
These actions contain Do Nothing, Shutdown, Blank Screen, Suspend, Hibernate, Ask For
5. Adjust screen brightness.
On the panel there's an applet which can adjust screen brightness by dragging and dropping.
6. Suspend/hibernate system
7. Visualize power consumption statistics
Very cool. Really looking forward to this in OpenSolaris. One thing that seems weird though is that there is no CPU policy for laptops (something like always run at lowest frequency unless plugged in).
Posted by Mark Phalan on April 24, 2008 at 12:24 AM CST #
Currently only two kind of CPU policies are supported
1. on demand, it means CPU adjusts its frequency according to the current system load.
2. performance, cpu runs at highest speed.
Posted by Jeff Cai on April 24, 2008 at 03:36 PM CST #
Mark, I think CPU frequency should be set according to the system load, while not the power mode. Even if I am using the battery, I still like to the system runs at high speed to finish my work as soon as possible. :)
Posted by Jeff Cai on April 24, 2008 at 03:47 PM CST #