Am Dienstag, den 19.06.2012, 10:03 +0200 schrieb Lennart Poettering: > On Mon, 18.06.12 21:56, Paul Menzel (paulepan...@users.sourceforge.net) wrote:
Dear Lennart, […] > > > What is cpufrequitls for? Why would anybody fiddle with that? "ondemand" > > > is the only CPU scheduler that makes sense, so what is this about? Also, > > > you can change the CPU scheduler via simple sysfs writes, right? So why > > > would you use a tool like "cpufreq" for this? tmpfiles should be > > > entirely sufficient? > > > > > > cpufreq stuff really appears to be sugar for > > > -Oit-feels-so-much-faster-now freaks... > > > > In Debian it is a recommendation of the package `gnome-applets`. > > > > $ LANG=C aptitude why cpufrequtils > > i gnome Depends gnome-applets (>= 2.91) > > i A gnome-applets Recommends cpufrequtils > > > > I guess it is useful to have an abstraction layer because directories > > and files under `/sys` might change. > > Nah, really, cpufrequtils should just go away. People should use the > kernel APIs right away. alright looking into why `cpufrequtils` is installed on my system I now know the reasons. The frequency(?) modules are not loaded automatically and therefore the init.d script shipped by `cpufrequtils` is needed. $ zless /usr/share/doc/gnome-applets/changelog.Debian.gz […] gnome-applets (2.24.2-1) experimental; urgency=low * es.po: updated Spanish translation from Francisco Javier Cuadrado. Closes: #502236. * Recommend cpufrequtils. Closes: #448833. The mentioned Debian bug reports #448833 [8] and #509827 [9] contain the discussion. Without the appropriate modules loaded – in my case `powernow_k8` – no power saving features of the CPU are available. $ find /sys -iname '*cpufreq*' /sys/devices/system/cpu/cpufreq $ ls -l /sys/devices/system/cpu/cpufreq/ insgesamt 0 $ sudo modprobe powernow_k8 $ ls -l /sys/devices/system/cpu/cpufreq/ insgesamt 0 drwxr-xr-x 2 root root 0 Jun 19 11:18 ondemand So how is this supposed to work out of the box? Thanks, Paul [8] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=448833 [9] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=509827
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