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 settings off: disable power management settings extra: on + enable extensive power management … 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_centisecs # Enable power management on all PCI devices find /sys/devices/pci* -path "*power/control" -exec bash -c "echo auto > '{}'" … Continue reading Reducing HP 4720s power consumption under Ubuntu Linux 11.10

HP Probook 4720s on Ubuntu 11.10 64bit Oneiric Ocelot

The new Ubuntu 11.10 is out as of yesterday, and naturally it is time for another upgrade. Because of the many tweaks [1], [2] I decided for a fresh install, this time directly on the notebook harddisk instead of a flash card. The live ISO worked nicely from the USB stick except for the WLAN, … Continue reading HP Probook 4720s on Ubuntu 11.10 64bit Oneiric Ocelot