ubuntu 14.04 - only performance and powersave governor available (i5 4.gen)

Posted by kinske on Ask Ubuntu See other posts from Ask Ubuntu or by kinske
Published on 2014-06-05T09:26:21Z Indexed on 2014/06/05 9:42 UTC
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Filed under:

14.04

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cpu

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cpufreq

After updating my ubuntu 13.10 to 14.04 there only these to govenors available for my cpu, instead of additionally ondemand and conservative.

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors 
performance powersave

My cpu is a Intel(R) Core(TM) i5-4200M CPU @ 2.50GHz, my laptop a LENOVO B5400 80B6QB0 and my kernel version is 3.14.1-031401-generic x86_64

Before updating the four governors were available. If this is important, I have installed tlp and indicator-cpufreq.

How do I get back the missing two govenors? ondemand is really important to me because of power saving.

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