[ltp] Direct Rendering's affect on battery life?

[Daniel Skorka]

On Wed, Apr 05, 2006 at 05:32:50PM +0200, Laurent Gilson wrote:
> 1. the DRI/DRM-part of the driver keeps the CPU awake even if there is  
> nothing to do. The CPU will switch to lower frequencies w/o any problems,  
> but it will stay in the first 1-2 C-States. W/o DRI/DRM it can enter C3 or  
> even C4 which reduce the power needed to run the CPU. Have a look at  
> /proc/acpi/processor/CPU/power and the "bus master activity". Optimal for  
> a idle desktop is 00000000.

This seems odd. My T43 has no trouble at all entering C3 and C4. Yes,
bus master activity seldom reaches 0, but C3 and C4 are still used.

Daniel