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Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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Colorless Green.

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Calibration of seismometers.

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Cache rewrite.

Extending OpenSSH.

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Re: Python's sad, unimaginative Enum; Some explanation; Printing binary trees sideways; About "Python's sad, unimaginative Enum"; Atoms in python; Some good feedback here; Frustration Understood; I agree with you #nt; What would be imaginative?; Re: Enum; this is fucking useless; Enum; Python's sad, unimaginative Enum; Possible Fix; Work, Exhaustion, Vacation; VirtualBox with Centos 6.3 to 6.4, client; Matasano - Programming Lessons Learned; PDF to HTML; Alternate Substitution; Why RSA Works; Trigger; Dreaming of Death; Example: Tracing; Using Coroutines In Protocol Simulations; Python 3.3 Only; Pure Python SHA1 and MD4 Implementations; Ubuntu on VirtualBox; Starting TOR as a service on OpenSuse 12.3; 1001 Albums; Using fail2ban on OpenSuse 12.3; PPPoE on OpenSuse 12.3; Good Article on Unified Physics; It's Police (Carabineros); Linux Software for Listening to and Exploring Music; Android is Pretty Bad; Lucky Number; 3D Printing for Casting; Cover Art for MPDroid; Who'd a thought the French were so bigoted?; PS Input Signal; Small Problem with Roksan K2 Amp; Roksan K2 Amp + ATC SCM7 Speakers; Do What Makes Sense; Re: Arguing About Tests, Still; Arguing About Tests, Still; Images; Good Article on NY Drummers; Related Bug Report; Getting Python 3.3 and Virtualenv Working in OpenSuse 12.3; How I Am; Awesome video about digital audio; The Difference Between Dimensional and Normalized Databases; The rise of the new Chinese bogeyman; Updated Syntax; Very First Steps to C-ORM; The Ideal User Interface For Music Exploration; Can The Republicans Be Saved?; Rate Limiting Calls to EchoNest; Mods to Cache; Comparing UYKFG and UYKFD/E/F; Someone Else is Concerned; EchoNest-based Playlist Generator for MPD; Example Voting Results; A Heavyweight Python Cache; Identifying Artists with EchoNest; Notes on Pregalex / Pregabalina / Lyrica; The Neil Cowley Trio; Drake - Make for Data; A Reliable Python Web Service; Useful Python Date/Time Library?; Need to Sleep, But this is Good; Command Line Set Difference; Little Details...; Linux Command Line Tricks; AutoTools Tutorial; Hangman Tactics; A Tor Proxy Embedded In A Web Page; Tree (Nested Dicts) in Python; Sleeping at Parties; I Know Someone Who Hurts Other People; Light and Tea; Description of the LCS35 Time Capsule Crypto-Puzzle; Re: I can relate to that ...; I can relate to that ...; Re: It's 2012 Why Does My IDE Suck?; My Own Alternative Medicine; Nice explanation of SVM; Why and How Writing Crypto is Hard; Re: It's 2012 Why Does My IDE Suck?; Incremental Regular Expressions; BBC Map Confused at Pole; Social Media: Ground Zero in the Culture War; My Visit to the Psycho Doc; Learning Modern 3D Graphics Programming; Hope you got some crackers to go with the cheese; Re: But how easy would it be ...; But how easy would it be ...; Powerline Freq Fingerprinting of Audio; The Folly of Scientism; Cheese - Because You're Going to Die Anyway; Another GPU Success - PyCUDA, Cross-Correlations

Extending Battery Life on X60 (OpenSuse, powertop)

From: "andrew cooke" <andrew@...>

Date: Sat, 29 Nov 2008 17:46:47 -0300 (CLST)

I just bought a new battery and decided to see if I could extend its life
by careful configuration of my system.  Typically I use my laptop plugged
into the mains at home, and so don't need a battery except if I'm carrying
it from one room to another.  The only time I really rely on the battery
is when I am flying, and then typically I want to get some work done, but
have no need for sound or an internet connection.

So what follows is a bit extreme, perhaps, because I only intend to use it
when, for example, on an aeroplane.

First, I disabled 3d acceleration on the graphics (this is a checkbox
inside SAX - if you go to the Yast GUI thing for the display you'll see
it).  That has made the fonts uglier (and smaller) for some reason.

Second, I run the following script as root immediately after booting (by
hand, once I have logged in).

Together, that lowers the number of interrupts to the low 10s per second
(this is the number that the powertop tool focuses on - it means that the
CPU can stay in its idle state for longer).

Andrew

PS Here's the script - it's quite possible that some things are
unnecessary; I just kept piling stuff on until the numbers went down...

#!/bin/bash

/etc/init.d/mysql stop
/etc/init.d/powersaved stop
/etc/init.d/ntp stop
/etc/init.d/sshd stop
/etc/init.d/network stop

ifconfig wlan0 down
ifconfig eth0 down

mount -o remount,noatime /

echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
ethtool -s eth0 wol d

killall NetworkManager
killall gaim
killall kopete
killall synergyc
killall skype
killall kaffeine
killall gkrellm
killall artsd
killall kpowersave
killall kpowersaved
killall knetworkmanager
killall kmix
killall klipper
killall acpid

for module in thinkpad_acpi pcmia yenta_socket snd_pcm_oss snd_seq
snd_seq_device snd_hda_intel snd_pcm snd_timer snd_hwdep snd_mixer_oss
snd_page_alloc snd processoracpi_cpufreq ehci_hcd uhci_hcd usbcore e1000e;
do
  echo "$module"
  if `lsmod | grep "$module"`; then
    rmmod "$module"
  fi
done

Batter Control via SMAPI