Author Topic: Low CPU frequency on kernel 4.4.0  (Read 609 times)

Offline januszk

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Low CPU frequency on kernel 4.4.0
« on: March 30, 2016, 01:06:48 pm »
hI,
After installing minimal Sparky 4.3.0, I  dist-upgraded the system (openbox) to 4.4.0-1-amd64. My laptop is lenovo with i5 4200 processor.
When booting using kernel 4.4.0-1 cpu frequency is about 700 MHZ ,is not scalled and remind so despite running different applications.
When booting 4.3.0 it is properly scaled 0.8 to 3.1 GHz. I see it using -  watch grep \"cpu MHz\" /proc/cpuinfo.
Did the same on bare debian. It is similar.
What I'm doing wrong?
« Last Edit: March 30, 2016, 05:08:26 pm by januszk »

Offline seonine

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  • Debian since "REX" is stable! RIP Ian Murdock
Re: Low CPU frequency on kernel 4.4.0
« Reply #1 on: May 08, 2016, 09:09:38 pm »
Greetings from germany

try to install the cpufrequtils the way you want to... and after that
try
Code: [Select]
cpufreq-info
and check which governor is activated....

the governor by default should be "on demand" ... maybe you are
on powersave... so the cpu can't speed up... :-[

hth

SeONine

Offline januszk

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Re: Low CPU frequency on kernel 4.4.0
« Reply #2 on: May 24, 2016, 05:51:42 pm »
I think the problem was specific to lenovo i5. With next kernel frequency adopts to workload as needed.
Thanks seonine for replay & greetings
januszk