Re: [PATCH] [Fwd: Console locking and blanking]

[Alejandro Bonilla Beeche]

On Tue, 2005-08-16 at 23:44 -0400, Steven Rostedt wrote:
> On Wed, 2005-08-17 at 13:29 +1000, Benjamin Herrenschmidt wrote:
> > On Wed, 2005-08-17 at 11:41 +1000, Benjamin Herrenschmidt wrote:
> > 
> > > (I'm blind and I use a braille display. I use those functions to blank 
> > > my laptop's screen so people don't read it, and hopefully to conserve 
> > > power.)
> 
> At the OLS I learned that the backlight of a laptop (when the screen is
> black, but still glows) actually spends more wattage than when the
> screen is lit.  So, unless you actually turn the laptop display off,
> switching it to black will actually burn the battery quicker.

This sounds stupid. Who told you this? The actual brightness is the one
that consumes the most battery.

Seriously, who told you such thing?

.Alejandro

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