https://www.thinkwiki.org/w/api.php?action=feedcontributions&feedformat=atom&user=Epeli 2026-04-03T17:56:45Z User contributions MediaWiki 1.31.12 https://www.thinkwiki.org/w/index.php?title=How_to_get_SpeedStep_working_on_Coppermine-piix4-smi_based_ThinkPads&diff=29007 2007-03-31T10:08:56Z

<p>Epeli: Ubuntu Edgy solution</p> <hr /> <div>==Foreword==<br /> APPLYING THIS HOWTO MAY MAKE YOU DUMB, CRASH YOUR CPU, YOUR MOTHERBOARD, MAKE YOUR GIRLFRIEND LEAVE YOU, OR MAYBE WORSE, USE IT AT YOUR OWN RISKS, I'M NOTHING OF A KERNEL HACKER, NEITHER A SMART GUY, THIS IS HOW I TRiED TO GET IT WORK, AND TILL NOW IT IS WORKING, MY PROPOSITION ARE ALMOST GUARANTED TO BE DUMB.<br /> <br /> This HowTo is intended for people having trouble getting SpeedStep working via CpuFreq on their Coppermine CPU with a piix4 mainboard. <br /> ThinkPads known to have this configuration are the {{X20}}, {{X21}}, {{T20}}, {{T21}}, {{T22}}, {{TransNote}} and possibly {{A20m}}, {{A20p}}, {{A21e}}, {{A21p}}, {{A22e}}, {{A22m}}, {{A22p}} models. (EDIT: A21m reported to be frequency-scaling according to GNOME CPU Freq Applet in Ubuntu Dapper and perhaps already in Hoary)<br /> <br /> The issue is that these CPUs do not repport correctly that they are SpeedStep capable.<br /> <br /> This Document is under the GNU/GPL v2+ Licence.<br /> <br /> ==My case==<br /> &lt;!--<br /> ==============================================================================<br /> (this part is intended for Google matching of people having the same logs ). <br /> ==============================================================================<br /> --&gt;<br /> This is what i get:<br /> I have a x21 IBM ThinkPad, and when trying the SpeedStep implementation of 2.6 kernels i got:<br /> :{{cmduser|sudo modprobe speedstep-smi}}<br /> :{{cmdresult|FATAL: Error inserting speedstep_smi (/lib/modules/2.6.10-rc1-mm4-xa1/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-smi.ko): No such device}}<br /> <br /> Rebooting with &lt;tt&gt;cpufreq.debug=7&lt;/tt&gt; ( 1 is for core, 2 is for ??, and 4 is for drivers, 7 = 1 + 2 + 4 ) gave:<br /> :{{cmduser|sudo modprobe speedstep-smi}}<br /> :{{cmdresult|FATAL: Error inserting speedstep_smi (/lib/modules/2.6.10-rc1-mm4-xa1/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-smi.ko): No such device}}<br /> :{{cmduser|sudo tail /var/log/syslog}}<br /> :{{cmdresult|[...]}}<br /> :{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: x86: 6, model: 8}}<br /> :{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: Coppermine: MSR_IA32_EBL_CR_POWERON is 0x44080020, 0x0}}<br /> :{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-lib: Coppermine: MSR_IA32_PLATFORM ID is 0x0, 0x540000}}<br /> :{{cmdresult|Nov 11 19:54:20 localhost kernel: speedstep-smi: No supported Intel CPU detected.}}<br /> <br /> ==How to get it work==<br /> Note: to get this working on recent kernels you'll need:<br /> CONFIG_X86_SPEEDSTEP_RELAXED_CHECK = y<br /> Disable the speedstep-lib checks<br /> :{{cmduser|1=sudo modprobe speedstep-lib relaxed_check=1}}<br /> :{{cmduser|sudo modprobe speedstep-smi}}<br /> <br /> In Debian ( and probably with others, please confirm ), you can automate the module parmeters by creating a {{path|/etc/modprobe.d/speedstep-lib}} file with:<br /> options speedstep-lib relaxed_check=1<br /> <br /> And then, you may add these 2 lines to {{path|/etc/modules}}:<br /> speedstep-lib<br /> speedstep-smi<br /> <br /> ===Ubuntu (Edgy)===<br /> In Ubuntu I had to do following to make it work. Tested with T22.<br /> <br /> :{{cmduser|sudo modprobe -r speedstep-lib speedstep-smi }}<br /> :{{cmduser|1=sudo modprobe speedstep-lib relaxed_check=1}}<br /> :{{cmduser|sudo modprobe speedstep-smi }}<br /> :{{cmduser|sudo modprobe cpufreq_userspace }}<br /> <br /> With these cpufrequtils works fine.<br /> <br /> ==How to use it==<br /> [[How to make use of Dynamic Frequency Scaling]]<br /> <br /> ==What's not working==<br /> <br /> On an X20, speedstep_smi messes up acpi and nvram. Best not to use it. See [http://bugzilla.kernel.org/show_bug.cgi?id=6847 Kernel bug 6847]<br /> <br /> The speeds shown may be erroneous, which has dramatic consequances if you try to watch movies or applications that are (exact) time-depending (as the timer is all dizzy).</div>

Epeli