andre_debian@... wrote:


> My kernel version (Jessie) is 3.2.0-4-686-pae,
> and I don't observe a good energy usage
> of the battery, always very lower compared
> to Windows and my desktop is recent (april 2015).
> 
> Andr�

There are many things I do manually as I have not found a way to do it via
gui or so.

CPU frequency
GPU frequency
Wireless power
disks power
display

basically everything that consumes power and this power consumption can be
reduced. I have done this on 2 notebooks and 1 pc. Non of them was
configured properly after installation.

I am not using windows on the recent notebook, so I don't know how long it
lasts, but with wireless on with 10db power and display turned on most of
the time (75%) it was holding for 5h. (Dell Latitude e5440) kernel was
4.1.6 last time I was on the road

example i915.i915_enable_rc6=1 acpi_backlight=vendor in command line

https://wiki.ubuntu.com/Kernel/PowerManagement/PowerSavingTweaks

regards