How to switch to discrete graphics card on ubuntu?

Question

Video cards

habrahabr.ru/blogs/ubuntu/94032/ used this topic.
Does not work.
0:IGD:+:Pwr:0000:00:02.0 (Intel hd graphics 4000)
1:DIS: :Pwr:0000:01:00.0 (AMD Radeon HD7670M)
There are drivers, the only question is how to switch?

Answer 1

If Ubuntu is the latest, I advise you to look HERE .
On older versions and free firewood, turning on the discrete is done like
echo ON > /sys/kernel/debug/vgaswitcheroo/switch
On proprietary
sudo aticonfig --px-dgpu