cpufreq frequencies off for Core 2 Duo E6600 "Conroe"

Hi all,

I'm the happy user of a shiny new C2D E6600 CPU. While cpufreq works, it only offers support for the lowest possible frequency (1596MHz)

(Linux mhcln01 2.6.19-rc1-git5-mh02 #3 SMP Tue Oct 10 01:35:05 CEST 2006 i686 GNU/Linux )

root@mhcln01:../system/cpu/cpu0/cpufreq >cat scaling_available_frequencies
2394000 2394000 2394000 2394000 2394000 2394000 2394000 2394000 2394000 1596000

As I understand it, the command above should list all possible "steps" for this CPU. The E6600 supports a multiplicator change between 6 and 9. For a default FSB of 266 this would mean the valid steps for the CPU are:

2394000 2128000 1862000 1596000

There is another thing bugging me with cpufreq:
+root@mhcln01:../system/cpu/cpu0/cpufreq >cat scaling_cur_freq 1596000
+root@mhcln01:../system/cpu/cpu0/cpufreq >cat cpuinfo_cur_freq 1596000

Since the machine is overclocked to FSB301 (2.7GHz), the output above is clearly wrong (should read 6 x 301 = 1806MHz). I wonder if it would be possible to replace the output with the real frequency, not some hard-wired frequency/vcore value?

Thanks for your time.

Matthias 'CoreDump' Hentges 

My OS: Debian SID. Geek by Nature, Linux by Choice

Hi,

That's probably because the BIOS only exposes the lowest and the highest frequency.

Not easily.

Dominik