On 18/07/2003 at 14:36, Teemu Ikonen wrote: > On 18/07/03 10:02, Kiko wrote: > > My iBook also becomes quite hot after some time of use in this season. > > In my case, the responsible is the hard disk. I use this daemon: > > http://mnm.uib.es/~gallir/cpudyn/ > > that sets powersave/performance modes dynamically (I do not notice any > > performance degradation, it works quite well). > > This kind of software would be very useful in prolonging the battery time, > but I noticed that it does not work in my Powerbook G4 550 Mhz (aka TiBook > II aka Powerbook3,3) due to lack of kernel support for /proc/cpufreq.
Indeed it is!, but the main advantage for me is reducing temperature (but it does extend battery duration, and thus battery life). > Is this because the the hardware in this particlar model does not support > changing the cpu frequency, lack of specs or what? I noticed that most of > the other G4 Powerbook models are supported, including Powerbook3,2 and > Powerbook3,4. Is there something I could do to help get this working? Well, first thing you must know: does your cpu support frequency scaling? Don't know if your TiBook does, I would bet it does, but really have no idea. Then, compile a kernel with support for it (or get a precompiled one). IIRC, frequency scaling support is not included in vanilla kernel sources (from www.kernel.org), _it is_ in BenH, and in "-ac" branches (Alan Cox patches). You can know if your kernel has support for frequency scaling compiled in because there will exist /proc/cpufreq. Then, cpudyn should work "out of the box" (in fact, the only thing you have to activate if you want it, is automatic disk standby after inactivity; it is disabled by default). Best regards. -- Kiko
