Ubuntu 12.10 64bit on the HP ProBook 4720s

With the trusty HP ProBook 4720s refusing to give up it's time to give the new Ubuntu 12.10 a spin. After having tried out the 11 and the 12 series with mixed feelings [1], [2]. Installation Installation of the live CD image on a USB stick was easy and without any problems. The system booted … Continue reading Ubuntu 12.10 64bit on the HP ProBook 4720s →

Automatically starting an SSH tunnel in Ubuntu

As I am a frequent guest in public WLANs I spent some time looking into ways to connect safely to both the corporate network and the rest of the internet while enjoying the amenities of a cafés' or hotel's wifi. Because of its simplicity and universal availability I like SSH tunnels which are easily set … Continue reading Automatically starting an SSH tunnel in Ubuntu →

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 →

Ubuntu 12.04 LTS on the HP ProBook 4720s

Update: Ubuntu 12.10 is out; check how it does on the HP Probook 4720s. Canonical releases just a few days ago Ubuntu 12.04, which according to their roadmap [1] will be supported until 2017. If you have been following this blog or even tried out Ubuntu on your 4720s you know that the ride [2] … Continue reading Ubuntu 12.04 LTS on the HP ProBook 4720s →

Installing a local DNS cache on Ubuntu 11.10

A while ago I noticed that Firebug would report 40-100ms DNS lookups for sites that could not possibly not be in the local DNS. When reloading a page that had just been rendered, the same DNS lookup delays would show up over and over. I could not verify whether it's an issue with my ISP … Continue reading Installing a local DNS cache on Ubuntu 11.10 →