That appears to be a Dothan core. My cpuinfo shows (same family & model, different frequency):
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 13 model name : Intel(R) Pentium(R) M processor 1.60GHz stepping : 6 cpu MHz : 600.051 cache size : 2048 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe up est tm2 bogomips : 1201.24 clflush size : 64 Frequency scaling used to work with speedstep-centrino, up to and including Edge (kernel 2.6.17). I _think_ it worked with 2.6.18, early on in the Feisty development cycle, but it hasn't worked with any of the 2.6.19 or 2.6.20 kernels. Since the Dothan freq/voltage pairs have never been officially coded into speedstep-centrino, I can only presume that it obtained them via ACPI (still using the speedstep-centrino driver however). Since the ACPI code in speedstep-centrino was deprecated, and copied to acpi-cpufreq, it hasn't worked. The acpi-cpufreq module does not work either. This is really frustrating - not only does my notebook fan never turn off now, but the CPU is stuck running at 600MHz, instead of floating between 600MHz and 1.6GHz. I've also opened a bug on bugzilla.kernel.org: http://bugzilla.kernel.org/show_bug.cgi?id=8245 -- Kernel doesn't scale my CPU. https://launchpad.net/bugs/93331 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
