Ubuntu
cpufreqd package

  1. Bug #422858
  2. Comment #74

Comment 74 for bug 422858

Revision history for this message
Matko Jun (matko-jun) wrote :

As far as i know (and wikipedia confirms: http://en.wikipedia.org/wiki/SpeedStep#Operating_system_support) XP does use EIST. When idle my computer -> properties shows 800MHz, under load (youtube with HD video) it rises to 1,66GHz. EIST in XP is disabled when power managment profile is set to "Home/Office Desk".

Quote from wikipedia:
"Under Microsoft Windows XP, SpeedStep support is built into the power management console under the control panel. In Windows XP a user can regulate the processor's speed indirectly by changing power schemes. The "Home/Office Desk" disables SpeedStep, the "Portable/Laptop" power scheme enables SpeedStep, and the "Max Battery" uses SpeedStep to slow the processor to minimal power levels as the battery weakens."

Maybe there is a problem in Ubuntu acpi module (or some other module(s)?), maybe trying to upgrade some modules to lucid ones will fix this annoying problem?