| 2006-10-29 10:43:06 |
Arnaud |
description |
Binary package hint: powersaved
VERSION: using fully updated kubuntu edgy.
- Frequency scaling is not working
because
- powersaved fails to load cpu frequency governors, and frequency scaling doesn't work
because
- at the start of the load_governors() function, script /etc/init.d/powersaved checks for readable "/sys/devices/system/cpu/cpu0/cpufreq". And that folder doesn't exist _at that time_. If the folder does not exist or is not readable, cpu freq governors kernel modules are not loaded.
because
- the folder "/sys/devices/system/cpu/cpu0/cpufreq" is created by the kernel after the appropriate cpufreq module is loaded (in load_cpufreq_modules() function)
and
- load_governors() is called too early after loading cpufreq module
The FIX:
in function load_cpufreq_modules() of /etc/init.d/powersaved, a small delay has to be introduced between the loading of cpufreq module and the call to load_governor.
I tried a sleep .2 which was too short, but a sleep 5 works perfectly.
The sleep delay has to be adapted, which I couldn't do (lack of time).
I hope this report is useful.
thanks for your work |
Binary package hint: powersaved
VERSION: using fully updated kubuntu edgy.
- Frequency scaling is not working
because
- powersaved fails to load cpu frequency governors, and frequency scaling doesn't work
because
- at the start of the load_governors() function, script /etc/init.d/powersaved checks for readable "/sys/devices/system/cpu/cpu0/cpufreq". And that folder doesn't exist _at that time_. If the folder does not exist or is not readable, cpu freq governors kernel modules are not loaded.
because
- the folder "/sys/devices/system/cpu/cpu0/cpufreq" is created by the kernel after the appropriate cpufreq module is loaded (in load_cpufreq_modules() function)
and
- load_governors() is called too early after loading cpufreq module
a quick FIX:
- in function load_cpufreq_modules() of /etc/init.d/powersaved, a small delay could be introduced between the loading of cpufreq module and the call to load_governor. I tried a sleep .2 which was too short, but a sleep 1 works perfectly.
Hoping this reporting is useful, thanks for your work |
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