My Ubuntu version is 14.04 4.4.0-81-generic, laptop is Dell Inspiron 3558 with Nvidia video card GeForce-920M and integrated Intel HDGraphics. I have spent a huge amount of time trying to find a way to switch between graphic cards.
I tried installing Bumblebee and different (suggested by ppa:graphics repository (390, 384 and 387 versions)) Nvidia drivers and everytime it ends up with "low graphics mode" screen when I switch to Nvidia card.
By the way, binary Nvidia drivers gave black screen while installing drivers from
*.run source files from Nvidia website Ubuntu gets stuck in a login loop (i.e. when I log in, then it logs out immediately). I haven't found an appropriate solution of my issue on the Internet.
What else can I do?