[ltp] X61s power consumption

[Yves-Alexis Perez]

On Thu, Jun 26, 2008 at 05:43:57PM +0200, Tino Keitel wrote:
> I noticed that xbacklight -set 0 behaves different with different
> setups on the same hardware. With a kernel from Debian unstable
> (2.6.25), the level 0 was quite dark, but readable in a dark
> environment. With a custom kernel (also 2.6.25), setting it to 0 gives
> a completly dark screen, just the window borders are visible a little
> bit.
> 
> As I don't want to measure the power consumption of an unusable
> computer, I always use a brightness that is still usable. So the above
> command should be adjusted to something that gives a somewhat usable
> bightness when comparing numbers.

It may depend wether acpi video.ko is loaded, wether thinkpad-acpi is
loaded, what are the kernel config etc.

On my T61, at one time, depending on the kernel and X driver, and the
method used by xbackight (see in xrandr -prop), the 0 could be complete
dark, black, lcd switched off, or only a "minimal brightness". Currently
0 is "only" minimum brightness.
-- 
Yves-Alexis