[Bug 36345] Re: speedstep won't load on ThinkPad T20 and s30 (mobile coppermine Pentium 3)

[Ben Collins]

There's only two reasons this driver will return an ENODEV.

1) It doesn't detect a proper CPU. You have a PIII_C, which means this likely isn't the problem.

2) It detects and incorrect IST signature. This is likely the problem. It's not a kernel bug, however.
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speedstep won't load on ThinkPad T20 and s30 (mobile coppermine Pentium 3)
https://launchpad.net/malone/bugs/36345