My machine is a Lenovo G580 with these specifications:

  • Processor: intel core i7 3520M
  • Graphics: intel core HD graphics 4000 + nvidia Geforce 710M
  • RAM: 6GB

I'm on ubuntu 13.04 64 bits and I've set up bumblebee.

The computer gets too heat (more than 70ºc) when I leave the cpufreq in "ondemand" mode and it shouldn't since I'm not doing too intensity-CPU stuff.

I think that it's due to excessive use of intel hd graphics for rendering the screen, because if i put the frequency to 2.9GHz, the temperature is still ok; but I leave the cpufreq to switch the cpu freq, it warms up.

A workaround could use the nvidia graphics card for unity and firefox (things I've always opened), something I don't know how to do it.

Also, i would like to know if, eventually, the optimus nvidia technology (to change automatically from integrated to dedicated GPUs depending on the current graphics/video use.) it's going to be supported in Linux, either proprietary or open source way.

  • cat /proc/acpi/bbswitch , it should show OFF, if not then there is a problem. – Qasim Apr 12 '14 at 20:31

I'm sure the discrete graphics-card, the nvidia Geforce 710M, must be responsible for your heating problem. By using bumblebee you may have triggered it. I recommend using the nvidia-prime driver (activate in "system settings -> software & updates -> additional drivers -> nvidia-331") and to choose manually between integrated and discrete graphics, which is possible within "nvidia-settings->PRIME Profiles". By turning the nvidia card off your laptop will stay much cooler.

  • Hi. If I go to additional drivers I can't see any driver from nvidia. – Akronix Apr 12 '14 at 20:50

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