I am using Ubuntu 15.04.
I have tried the following command:

lspci -vmk | grep -A 8 -B 2 VGA

But it always shows me the same results (both graphic cards) even with bumblebee installed, so I don't trust it. Or maybe Unity is so heavy that it needs my both cards all the time ?

  • Note: the Ubuntu version is 15.04 - the 0 is important. – Hannu Aug 25 '15 at 10:57

Try nvidia-smi -q | less in the shell/Terminal/bash

More info: nvidia-smi -h and man nvidia-smi

  • Sorry, I should have written more details. I'm not using proprietary drivers for Nvidia now, just the default nouveau. Bumblebee is installed with "--no-install-recommends" option. So probably thats the reason I don't have nvidia-smi tool in my system. – J Mad Aug 25 '15 at 12:30
  • Well, then you might have luck with finding similar tool for either bumblebee or possibly X – Hannu Aug 25 '15 at 12:42

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