C-States on Inspiron 6000

I'm experiencing problems with ACPI C-States higher than 1 an Inspiron 6000. At any higher setting Xorg graphics are choppy and input from the touch-pad is not recognized correctly (e.g. button clicks only register as half-clicks or don't register at all). If I set max_cstate to 1, the problems disappear, although the CPU is about 6 degrees hotter at rest than max_cstate=4. At max C-State 1 the CPU is idle, but at higher max C-States it displays constant spikes.

The problem occurs on both Gentoo 2.6.13 and 2.6.14. This problem is always reproducible, by simply changing the max_cstate setting from 1 to 2.

(Please CC me replies).

Thanks,

-Si.

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