Category: power

Reducing power consumption on the HP Probook 4720s and Ubuntu 12.04

As said earlier, Ubuntu 12.04 does a good job with power management on the 4720s. With some manual settings power consumption can be further decreases, albeit not much this time. I wrote this script which takes a parameter:on: enable power management settingsoff: disable power management settingsextra: on + enable extensive power management settings. This is … Continue reading Reducing power consumption on the HP Probook 4720s and Ubuntu 12.04

Reducing HP 4720s power consumption under Ubuntu Linux 11.10

Mainly annoyed by the loud fan I looked into ways of reducing power consumption of the HP Probook 4720s and came up with this script:#!/bin/sh -e# Increase filesystem write cache timeoutecho 1500 > /proc/sys/vm/dirty_writeback_centisecsĀ  # Enable power management on all PCI devicesfind /sys/devices/pci* -path "*power/control" -exec bash -c "echo auto > '{}'" \;# Enable power … Continue reading Reducing HP 4720s power consumption under Ubuntu Linux 11.10