x220 notes

[Erich Dollansky]

Hi,

On Wed, 10 Oct 2012 16:26:58 -0700
Любомир Григоров <nm.knife at gmail.com> wrote:

> Hi, I am now running 10 HEAD with latest committed KMS patch.

I must admit that I did not update this machine since some time.
> 
> I do not use currently suspend and resume on my X220. I use a script
> >  for the brightness which makes it easy to handle for me.
> >
> I am still stuck with:
> - add LEN0086 to acpi_ibm
> - recompile
> - kldload acpi_call
> - acpi_call -p '\VBRC' -i n    // n is 0-16
> 
> Can you share the script you have made, especially if you were able
> to bind hotkeys to it?
> 
The scripts are still available here

http://www.alogreentechnologies.com/freebsd/XonX220
http://www.alogreentechnologies.com/freebsd/setbrightness

I never tried to bind the script to keys. I made some menu items in
blackbox which works for me.
> 
> > There is a fundamental problem with powerd which stops a notebook to
> > get better battery life time. powerd does not include the display
> > brightness and it does not inlcude user activities in its process to
> > regulate the CPU speed. In addition, the algorithm to find the best
> > CPU speed gets easily irritated with short bursts of peak
> > performance requirements.
> >
> > Erich
> >
> I do lose about 1-2 hours of battery time as opposed to Windows(I get
> 7-8 hours there) due to those same bursts of performance, despite
> running the adaptive profiles. My main concern is manual control of
> brightness though.
> 

You lose only 1-2h? I lose at least 2h.

I have had several tries to make it better but got always held up by
other things.

My last attempts have still been with the Crusoe CPU. They gave the
machine near XP battery times but needed manual interaction. So, I
never published them.

Erich