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June 19, 2008
» Extend Your Battery Life With Powertop

If you use a Linux laptop and have not heard of PowerTop you really need to keep reading!  This is a fantastic tool for extending your battery life written and published by Intel.  I use it constantly on long flights and my battery lasts long enough for a cross-country flight.

Installing Powertop

PowerTop is available in the Ubuntu repositories so its a really easy installation:

sudo aptitude install powertop

Once you’ve got it installed start things up using:

sudo powertop

This application will scan your machine for 5 seconds and then tell you which hardware or application is causing the most drain on your machine.  The best part about it is that it’ll offer you suggestions along with shortcut keys to disable the feature or hardware in order to conserve power!

Some of the common things that powertop suggests disabling on my machine are bluetooth, wireless and add-on storage (cdrom, usb-devices, etc).  Disabling these few things can extend my battery up to an hour (depending on the software I’m running, of course).

I really suggest checking out powertop for any laptop user.  It should be part of your base installation setup.  What luck have you had with powertop?  How long can you extend your battery life?

Related

December 19, 2007

Clint Savage
herlo
Sexy Sexy Penguins » Tech
» Distro Comparison: openSUSE 10.3 - Day 5

I, unfortunately, can’t live in an environment like openSUSE without my bluetooth mouse.  I struggled through for 5 days, but am now back on Fedora.

I really appreciate the opinions, comments and helpful guidance given and look forward to installing Ubuntu early next year and doing a similar, yet majorly biased, comparison to Fedora.

If nothing else, this project has taught me that openSUSE, with all of its faults, is quite a nice distribution.  Many features are very well done, others need some work, but in the end, its not the distribution for me.

I hope my experience has given at least some a view of nice features and improvements that have been made in openSUSE.  I look forward to testing openSUSE 11 when it comes out.

Cheers,

Herlo

November 14, 2007

Clint Savage
herlo
Sexy Sexy Penguins » Tech
» POW: Bluetooth Improvements in Fedora 8

The POW is going to be the improvements made in the Bluetooth functionality in Fedora 8. I’m actually quite impressed with it as its been a bit of a challenge to keep my little mouse connected in the past.

Fedora 8 provides a new extended technology with its bluez-gnome package. In fact, the simplicity of it is that I only have to be able to click and approve a new device.

When I first turn on my bluetooth mouse and start to move it around, it doesn’t work, but up in the top right hand corner of my GNOME desktop is the bluetooth manager. It has a message for me:

bluetooth-authorize.png

The message indicates a click to authorize the device, namely the bluetooth mouse. (One note here, I was originally unable to use my touchpad, so I had to resort to other tactics [not pretty] to enable my mouse. Probably ought to have some other options available instead of clicking.)

Clicking on the notification window above brings me to an authorization window.

bluetooth3.png

At this point, authorization is quite simple. Click yes for a one time authorization of the mouse (Note the Bluetooth Travel Mouse indicated in the description), and to authorize it more permanently, choose Always Grant Access.

That’s it. My Bluetooth mouse is now enabled and working. I’d say this is much friendlier than what I used to have to do, including running hidd –connect <bluetooth id> after pressing the little connect button on the bottom of the mouse. This is sure nice now!

Its possible, that at some point, disconnecting the device might be necessary. To do this, right-click on the nice little Bluetooth logo at the top right of your screen.

bluetooth5.png

Choose Preferences. Up pops the Bluetooth Preferences window. From this window, three tabs are available. In the first (and also selected) tab, there is a section at the bottom of the window which lists the devices that are currently bonded and/or trusted. Choose the device from the list and then the appropriate action. The choices are Disconnect, Trust or Delete.

bluetooth4.png

In addition to just configuring your devices, it appears it might be possible to do things like Bluetooth DUN with a Treo, or enable data synchronization between laptops. One thing I’ve always wanted to try is to get my bluetooth headset working so I could do Skype or Asterisk phone calls through my headset, to my computer and out through the service.

Cheers,

Herlo