Talk:How to get SpeedStep working on Coppermine-piix4-smi based ThinkPads

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speedstep-smi fails to load if CONFIG_CPU_FREQ_DEBUG is not set

On a ThinkPad T22 I was not able to use speedstep-smi if CONFIG_CPU_FREQ_DEBUG is not set. See this bug report: http://bugzilla.kernel.org/show_bug.cgi?id=5553

RELAXED_CAP_CHECK on T20

On a Thinkpad T20 using Debian unstable and a stock kernel.org kernel 2.6.11.6, building the kernel with CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK=y doesn't seem to show the error you're experiencing while loading speedstep-smi. So that means loading speedstep-smi module results to no error at all.

Jan Alonzo 23:27 28-03-2024

From the kernel config:

 ┌────────────────────── Relaxed speedstep capability checks ──────────────────────┐
 │ CONFIG_X86_SPEEDSTEP_RELAXED_CHECK:                                         │
 │                                                                                 │
 │ Don't perform all checks for a speedstep capable system which would             │
 │ normally be done. Some ancient or strange systems, though speedstep             │
 │ capable, don't always indicate that they are speedstep capable. This            │
 │ option lets the probing code bypass some of those checks if the                 │
 │ parameter "relaxed_check=1" is passed to the module.                            │
 │                                                                                 │

this option only lets you use relaxed_check=1, it doesn't solve anything. this may mean that your model isn't affected at all, or that you have the described file in /etc/modprobe.d

ondemand t22

I would like to know if ondemand is possible on a t22. Also I'm wondering why cpu speed is only either 700mhz or 900mhz.

In /proc/acpi/processor/CPU/throttling there are 7 states defined, but changing them seem to does not do anything. Also cpudynd -acpi tells me there is no interface. I tried also to use acpi-cpufreq but it won't run because 'no such device'. How to use it?

Thx in advance, nusse.

no cpufreq interface found ?

I had a hard time to figure out that for cpufreq you also have to install (at least a subset of?) the modules

freq_table
proc_intf

I used modconf where I found these modules listet under "kernel/drivers/cpufreq" tagged as "not installed".

I am a newby using Debian Sarge on a Fujitsu Siemens Amilo D, with a Pentium III (Coppermine). However this information might also apply to thinkpads.

Trouble with 2.6.15

I am using linux-image-2.6.15-1-686 and speedstep-smi won't load anymore. Again 'no such device' error. No idea why yet. User:Daniel_X21