Mtippett: New page: The Proprietary Driver supports the ability to downclock mobile graphics processors to save power To view the current powerstate. The current state is marked with a *. Depending on syst...

2007-03-22T14:15:38Z

New page: The Proprietary Driver supports the ability to downclock mobile graphics processors to save power To view the current powerstate. The current state is marked with a *. Depending on syst...

New page

The Proprietary Driver supports the ability to downclock mobile graphics processors to save power

To view the current powerstate. The current state is marked with a *. Depending on system operation, hidden states may be currently active (due to there being thermal management in effect or other reasons).

<pre>
$ aticonfig --list-powerstate
core/mem [flags]
-----------------
* 1: 105/122 MHz [low voltage]
2: 209/182 MHz [low voltage]
3: 398/250 MHz [default state]
</pre>

To set the preferred powerstate

<pre>
$ aticonfig --set-powerstate=1
</pre>

In some cases, you will get a message similar to the following, indicating that the requested mode could not be achieved. If you have multiple displays running, you prevent the lower powerstate from being enabled, please see [[FeatureDisplaySwitching]]. If you turn off the second display you will automatically move to the lower state.

<pre>
$ aticonfig --set-powerstate=1
Error: Setting the requested power state failed.
Possible reasons:
- running in dual head mode
- thermal control is in effect
- trying to set the current power state again
</pre>

This is trivial to integrate with acpid or powersaved to switch performance of the display on AC/DC state changes. See the examples for more descriptions.

[[Category:FeatureUseCase]]

SetPowerMode - Revision history

Mtippett: New page: The Proprietary Driver supports the ability to downclock mobile graphics processors to save power To view the current powerstate. The current state is marked with a *. Depending on syst...