dev.cpu.0.freq disapeared

[Dmitry Sivachenko]

> On 23 марта 2015 г., at 9:03, Ian Smith <smithi at nimnet.asn.au> wrote:
> 
> 
> Do you have Enhanced Speedstep (EST), disabled in your BIOS settings?  
> If so, just turn it on.  Then you should also be able to set running 
> frequency to 'MAX performance' or similar there.
> 
> If not disabled, ie you have EST enabled in BIOS, that points to a real 
> issue of EST detection.  And it still seems strange that enabling p4tcc 
> is enough to have cpufreq(4) include OIDs for freq and freq_levels?
> 


Thanks to all who replied.  This is called Intel SpeedStep Tech in that BIOS and it was indeed disabled.

I enabled it and now I have in dmesg
est0: <Enhanced SpeedStep Frequency Control> on cpu0
even with hint.p4tcc.0.disabled="1" 

for each CPU and dev.cpu.0.freq appeared back.

Thanks for your help.