Hi, I have downloaded kernel-2.6.8 (debian-unstable package) via apt-get and have overwritten the speedstep-centrino file with the one published on http://tuxmobil.org/centrino.html. Then I have changed the .config-file of the kernel:
# # CPU Frequency scaling # CONFIG_CPU_FREQ=y CONFIG_CPU_FREQ_PROC_INTF=m # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y CONFIG_CPU_FREQ_GOV_PERFORMANCE=m CONFIG_CPU_FREQ_GOV_POWERSAVE=m CONFIG_CPU_FREQ_GOV_USERSPACE=y # CONFIG_CPU_FREQ_24_API is not set CONFIG_CPU_FREQ_TABLE=y # # CPUFreq processor drivers # CONFIG_X86_ACPI_CPUFREQ=m CONFIG_X86_ACPI_CPUFREQ_PROC_INTF=y # CONFIG_X86_POWERNOW_K6 is not set # CONFIG_X86_POWERNOW_K7 is not set # CONFIG_X86_POWERNOW_K8 is not set CONFIG_X86_GX_SUSPMOD=m CONFIG_X86_SPEEDSTEP_CENTRINO=m CONFIG_X86_SPEEDSTEP_CENTRINO_TABLE=y CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI=y CONFIG_X86_SPEEDSTEP_ICH=y CONFIG_X86_SPEEDSTEP_SMI=y # CONFIG_X86_P4_CLOCKMOD is not set CONFIG_X86_SPEEDSTEP_LIB=y CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK=y # CONFIG_X86_LONGRUN is not set # CONFIG_X86_LONGHAUL is not set I have compiled the kernel, loaded the module via modprobe and... SUCCESS ------- $ lsmod|grep speedstep speedstep_centrino 6868 0 processor 15088 2 speedstep_centrino,thermal ------------------------------------------------------------------------- Some weeks ago I read something about some clients which are capable of setting the cpu-speed dynamically. Today I have installed some of these and POWERNOWD have set the speed. Therefore, I have written a short shell-script: $ cat test2 while true; do cat /proc/cpuinfo|grep MHz; sleep 1; done ... and I received the following output: cpu MHz : 598.148 cpu MHz : 598.148 cpu MHz : 598.148 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 1495.371 cpu MHz : 598.148 cpu MHz : 598.148 I have noticed that there are only TWO STEPS at which the cpu is running! Finally I have read the manual-page of powernowd. EXCERPT: "This daemon works best with processors that support more then 2 frequency steps, like those with AMD's PowerNow!, and Intel's Pentium M family. ... Some other daemons are better suited for two speed states, and toggle between two states based upon load. This daemon does a better job handling intermediate steps." So, powernowd should handle more than two frequency steps on my Pentium M processor! BUT IT DOESN`T? ANY IDEA?
