How to find out which graphics card is currently active in linux?

Question

linux

The laptop has hybrid graphics, it costs ubuntu 15.10. How to find out which video card is active at the moment?

Answer 1

lspci -vnnn | perl -lne 'print if /^\d+\:.+(\[\S+\:\S+\])/' | grep VGA

Whoever has [VGA controller] at the end drives ;-)