Asus eeepc 900 intel celeron m can support powernowd by manually loading p4-clockmod module. Jaunty Alpha 6 Ubuntu 9.04

[Jean Roberto Souza]

Binary package hint: powernowd

Ubuntu 9.04 Jaunty alpha 6 i386

No cpu power saving support enabled.

Asus eeepc can support powernowd by manually loading p4-clockmod module.

https://bugs.launchpad.net/ubuntu/+source/cpufrequtils/+bug/184015

https://bugs.launchpad.net/ubuntu/+source/powernowd/+bug/19667

https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/96886

https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/85219

[Jean Roberto Souza (sjeanr)]

I'm testing the Jaunty Alpha 6 releases and I can see there have been big changes in powernow and/or cpufreq. Namely no cpufreq modules are loaded anymore, powernowd is not present, and yet the kernel still scales the CPU frequency if I use the command sudo modprobe p4_clockmod on terminal.

[Don Newell (ducky12432)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. If you could test the current Ubuntu development version, this would help us a lot. If you can test it, and it is still an issue, we would appreciate if you could upload updated logs by running apport-collect <bug #>, and any other logs that are relevant for this particular issue.

[Jean Roberto Souza (sjeanr)]

Hello Don Newell! Thank you for your reply! The issue persists unchanged and also affects Lucid.

As requested, the command apport-collect 343101 was applied. The result was:

"Updating problem report"

"No additional information collected"

I suspect I may need to include something else to this command. Could you help me to determine what should I include on this command line?

The following lines are an attempt to provide a clue to what's going on. See attached image, please!

CPU Frequency Scaling Monitor 2.29.5

The problem persists today and it also affects Ubuntu Lucid
Release 10.04 Kernel Linux 2.6.32-17-generic-pae
Gnome 2.29.92

Trying to add CPU Frequency Scaling Monitor to Panel will result on an error message that states as follow:

"You will not be able to modify the frequency of your machine. Your machine may be *misconfigured* or not have hardware support for CPU frequency scaling."

A print screen image of the message is attached to this report.

There are ways to activate this ability by following instructions reported on 2009-03-15. On lucid it will partially allow CPU scaling but the scaling profiles will be messed up. i.e on demand scaling profile will cause it switch to the lowest frequency and keep it there instead of increasing CPU frequency as required.

The problem/Bug

Frequency Scaling Monitor 2.29.5 does not work after it has been added to Panel. It shows an error message and is unable to manage CPU.

How it is supposed to work? How it is expected to work?

Frequency Scaling Monitor 2.29.5 should identify and allow CPU management upon activation. CPU management can greatly improve battery life if enabled.

Thank you for your attention. I will be waiting for any other information request.

[Jean Roberto Souza (sjeanr)]

https://answers.launchpad.net/ubuntu/+question/19284
http://ubuntuforums.org/showthread.php?t=190921
https://bugs.launchpad.net/ubuntu/+source/powernowd/+bug/257502