rollfaster Posted October 30, 2006 Share Posted October 30, 2006 Howdy all! After successfully running osx86 on my amd box - with pretty much everything working for the past 9 months, I got myself a project laptop to osx-ify. It meets the bare minimum compatibility with just sse2, no pae even, and os x installs fine. The issue here, and it is an issue that many people are having, is that with the pentium M (and many other intel processors), the computer boots at the lowest clock speed in speedstep (step3, in my case, 600mhz). This destroys the speed of the apps and gui and makes it hard to run anything. Since there is no speedstep driver (the acpicputhrottle only works if you have 3 clock speed steps above 1ghz, my 4 are 1000, 900, 800 and 600mhz), the computer will not clock up the proc under load. So my question is, is there any way to disable speedstep through a third party utility (ie. boot disk [hiren's doesn't have anything here], xp prog, etc) when I have no XP speedstep driver to help out and no bios options. This would make it so the laptop would run at full clock all of the time, burning battery, but making it viable. I would appreciate any input on this topic, as would many other people. Thanks! -RF Link to comment https://www.insanelymac.com/forum/topic/31650-any-way-to-disable-speedstep/ Share on other sites More sharing options...
Brandon Holland Posted October 31, 2006 Share Posted October 31, 2006 My 1.4 GHz Pentium M laptop would automatically get clocked to 600 MHz when running on battery. So I installed ACPICPUThrottle (just the kext). Then I added this to my /etc/rc: kextload /System/Library/Extensions/ACPICPUThrottle.kext sysctl -w kern.cputhrottle_cpufreq=1400 This will load the CPUThrottle kext then set the speed to my max speed or 1.4 GHz. This fixes my problems and runs it at full speed when on battery. Hope that helps. Regards, Brandon M. Holland Link to comment https://www.insanelymac.com/forum/topic/31650-any-way-to-disable-speedstep/#findComment-220471 Share on other sites More sharing options...
rollfaster Posted October 31, 2006 Author Share Posted October 31, 2006 Thanks for your reply brandon. Unfortunately, acpicputhrottle.kext does not load over here, as Niall, the lead dev, disabled all cpu clock speeds <=1000mhz for compatability's sake. So I'm left to look elsewhere. I appreciate your suggestion though, thanks very much. -RF Link to comment https://www.insanelymac.com/forum/topic/31650-any-way-to-disable-speedstep/#findComment-220563 Share on other sites More sharing options...
rollfaster Posted November 3, 2006 Author Share Posted November 3, 2006 Alrighty then, an update: Thanks very much to Brandon from above and to the folks that developed acpicputhrottle. I perused that thread thoroughly and plucked the last kext made before the sub 1ghz clock speeds were disabled (ACPICPUThrottle_kext_20060507.zip). It combined with the: sysctl -w kern.cputhrottle_CURfreq=1000 got me to my highest clock speed. And now OS X runs reasonably well, so thanks very much for the suggestion brandon, it's working great! Awesome community here, -RF ps. i'll crosspost this infor in the acpicputhrottle thread for the poor lowly lappies like mine (it is an ultraportable though). Link to comment https://www.insanelymac.com/forum/topic/31650-any-way-to-disable-speedstep/#findComment-223967 Share on other sites More sharing options...
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