a question about energy

Matthew Garrett mjg59 at srcf.ucam.org
Mon Mar 1 09:01:53 PST 2010

On Mon, Mar 01, 2010 at 05:06:57PM +0800, Zhi Li wrote:
> All,
> I'm working in a project which study energy saving on PCs. I saw a
> strange thing which was opposite to my intuition: when PC working on
> graphic mode, it would be more energy saving.
> When in graphic mode, on my PC, it is 52w; when I switched to terminal
> mode(on linux alt-ctrl-1), it is 55w.

X knows how to program power-saving features in your graphics card. If 
you're using a VGA text console, the kernel doesn't.

Matthew Garrett | mjg59 at srcf.ucam.org

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