On 6/21/07, Adam Sloboda <[EMAIL PROTECTED]> wrote:
It's the same and powertop never shows C4. I have ThinkPad Z61m with Core 2 Duo (T5500).
Is it Intel 945PM, or Intel 945GM? I have an Intel 945GM. There are some more registers to enable/disable PM. For example PMCFG at MCHBAR offset F10h: bit 1:0 =01/10 => disable c3 to c4 snoop timer based transition. Unfortunately I don't know how to access this with userspace tools.
BTW should be CPU idle power consumption same regardless of frequency? I can see the difference only under load.
AFAIK P-States (freq changes) only have effect in C0, so it makes a difference whenever your CPU is running some program (when it is in C0). So unless you don't intend to run anything on the laptop, using the P-state transitions is useful ;) --Edwin _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
