On Tue, 26 Oct 2004, Mitko Haralanov wrote: > Hi, I just installed Fedora Core 2 on my Dell Latitute C800 laptop and I > having trouble getting the cpu frequency scaling to work. The > /proc/cpuinfo file shows the cpu as: > > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 8 > model name : Pentium III (Coppermine) > stepping : 10 > cpu MHz : 997.943 > > however, I can't seem to find the driver that I have to use. I have > tried all the drivers in > /lib/modules/2.6.8-1.521/kernel/arch/i386/kernel/cpu/cpufreq/ and none > of the load. > > I would really appreciate any help since I have to go on a trip and I > will need to use the laptop but under current setup, the battery last > about 5 seconds. Don't remember all the details about FC2, but the speedstep driver is compiled the kernel - (hence fewer listings in /lib/modules/2.6.8-1.521/kernel/arch/i386/kernel/cpu/cpufreq than in FC1 kernel) - and it gets detected automatically (FC1 requires 'modprobe speedstep-centrino') I had briefly used this on a thinkpad with Pentium-M & speedstep was working fine. A couple of things to verify. - Your CPU is 1GHz and always at that speed? - do you have /proc/cpufreq ? (its on fc1 - don't remember fc2) - is /etc/init.d/cpuspeed daemon running? (if not - try starting/restarting) - once cpuspeed starts - do the following commands change the state? killall -SIGUSR1 cpuspeed # force max freq killall -SIGUSR2 cpuspeed # force min freq killall -SIGHUP cpuspeed # go back to dynamic freq scaling Satish
