ViaKT333/Jaunty athcool Fails

[parislanuit]

Binary package hint: athcool

My Motherboard is a Gigabyte GA-7va with a Via KT333 chipset with a Athlon MP 2200+ Processor(issued from a server).
UBUNTU Jaunty Jackalope 9.04, Filesytem: ext4
Both ATcool and FVcool won't work uner this config.
The same PC under windows (double boot) can implement SK2CTL without any probleme and a reduction in iddle wattage from 100w to aprrox 72w. Under ubuntu Jaunty wattage remains at around 100w (wattmeter)as athcool fails to start.

hal@hal-desktop:~$ sudo athcool on
athcool version 0.3.12 - control power-saving mode on AMD Athlon/Duron CPUs

!!!WARNING!!!
Depending on your motherboard and/or hardware components,
enabling Athlon powersaving mode may cause:
 * noisy or distorted sound playback
 * a slowdown in harddisk performance
 * system locks or instability
 * massive filesystem corruption (rare, but observed at least once)

Before use athcool, you must recognize these potential DANGERS.
Please use athcool AT YOUR OWN RISK.

athcool is supplied "as is". The author disclaims all warranties,
expressed or implied. The author and any other persons assume
no liability for damages, direct or consequential, which may
result from the use of athcool.

VIA KT266/333[A] (1106 3099) found
enabling 'Disconnect when STPGNT Detected' bit ... failed!
 Address 0x92 : (expected) 0x80 -> (actual) 0x00
enabling 'HALT Command Detection' bit ... failed!
 Address 0x95 : (expected) 0x02 -> (actual) 0x00
hal@hal-desktop:~$ lsb_release -rd
Description: Ubuntu 9.04
Release: 9.04
hal@hal-desktop:~$ apt-cache policy athcool
athcool:
  Installé : 0.3.12-3
  Candidat : 0.3.12-3
 Table de version :
 *** 0.3.12-3 0
        500 http://fr.archive.ubuntu.com jaunty/universe Packages
        100 /var/lib/dpkg/status