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

Question

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.

Solution

They are not missing, but depricated, since the Linux kernel (3.9 and later) includes the Intel P-State Driver.

Comments

[Andrea Lazzarotto]

They are deprecated, so they are not really important. However, you can tweak the TLP configuration to enable basically all of the suggested improvements given by powertop. This will help to reduce consumption and also keep the temperature low.

[Denilson Sá Maia]

Related: askubuntu.com/questions/544266/…

[kurp]

OK, but is there any way to achieve the lower temperatures and better power consumption? From the links you've provided, it seems that available governors may not be the best regarding aforementioned aspects.

[Kaspar]

But from where should one now change the Governor then?

[Kaspar]

And should the cpufreq-utils be used at all then anymore? I used to use indicator-cpufreq to change the behaviour of my CPU Governor. No it is only possible to change between Powersave and Performance in it.