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

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 1:

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