Power saving for the win!

Update 2: I've released a new version of the package that fixes numerous bugs and brings new features. Since updating requires some special care, it's best to check out the new article on this before trying to do anything manually.

Update: Apparently the startup script doesn't work correctly yet. Upon system boot, the governor is set to performance, probably after my script set it to ondemand or powersave. I'm currently looking into this and will release an update as soon as possible. Until then, You can either set the governor manually after logging in, You can remove my package, or You can turn the ondemand init-script back on:

Code:
update-rc.d ondemand enable

The latter method will set the governor to ondemand on system startup. This is not as good as powersave if You're running on battery, but it's still better than performance.


I'm happy to announce the second package in my PPA! cpufreq has joined the ranks of tablet-mode and is ready to be downloaded!

It's basically nothing else than a packaged version of my article on CPU governors and the power supply status. It has a few more checks (if certain nodes on the sys filesystem exist) and now also displays a list of available frequencies. If You want to increase the running time of Your laptop on battery, I recommend You get it while it's hot!

As of now, the package requires absolutely no configuration (as long as some things on Your system work the same way they do on mine) and if You should encounter any problems, just drop by, leave a comment or write me a mail. I'll try to fix it as soon as possible.

To install it, add the PPA to Your APT sources and update Your package list (as described here). After that, install it via synaptic or the console:

Code:
apt-get install cpufreq

Congratulations! You can now pull the plug and Your system automatically changes to the powersave governor! In addition, You can use cpufreq to change the governor manually on the command line (see the man page for details).

That's it! You're done!

Fred.deb

Update: There is a note on bugs at the end of the article.

Yay, I forged my first package! And I got my own PPA (personal package archive) at Launchpad!
The first package I made is based on my article on screen rotation. It contains the script itself (an improved version), the upstart script to map the keycodes and a configuration file (/etc/tablet-mode/tablet-mode.conf) to centrally configure the needed values.
Here's what You need to do if You want to use it (You need root access for most of the tasks):

1. Add the PPA to Your sources:
   

   Code:
   add-apt-repository ppa:fredfredfred/ppa

2. Refresh Your package list:
   

   Code:
   apt-get update

3. Install the package:
   

   Code:
   apt-get install tablet-mode

4. As told in the message during installation, You need to take a look at the configuration file, /etc/tablet-mode/tablet-mode.conf. Either use the comments from the file or have a look at my first article on this subject to find out the values You need. The values provided in the sample should work on an HP TouchSmart tm2-1090eg notebook, You only have to uncomment the last 2 lines to enable the keycode:scancode mapping upon system start.
   
5. Bind the scan codes to rotatescreen tableton and rotatescreen tabletoff, as described in the other article.
   

That's it! You're done!

Bugs: If You turn the screen, put it down and then hibernate Your laptop, turn the screen back and power it back on, the screen is upside down as is the tablet orientation. I will not fix this, since I cannot. Upon resuming from suspend, there is no way for me to check which position the display is in. Use the console commands rotatescreen tableton and rotatescreen tabletoff to switch between the modes manually (or use the GUI).