On Core2 Duo laptop (FSC Celsius H240) there is 1 CPU with 2 cores. There are 2 thermal zones. KPowersave sets cpufreq governor on both cpu0 and cpu1. (Setting "Powersaving" in KPowersave menu and checking cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor states "powersave", cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor states "powersave"). KLaptop only sets cpufreq governor on cpu0 (Setting "Powersaving" in KLaptop menu and checking cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor states "powersave", cat /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor states "performance"). Current Gentoo, Kernel 2.6.20-r8 (gentoo-sources). System built originally on 2006.1, but profile switched to 2007.0. KDE3.5.5. ACPI built into Kernel (static). If you need more information, I'll be happy to provide. Reproducible: Always
Please report this at https://bugs.kde.org/. Unfortunately klaptopdaemon is not well maintained, so I would not expect too much, though.