After many days, perhaps even weeks, I was able to run the graphics card from AMD, and while the hybrid mechanism.
I worked on Ubuntu 14.04.1 using the latest drivers from your video card manufacturer.
- Download the drivers from AMD / ATI.
- Run it in the console (in graphical mode) by typing
sudo sh ./amd.run (I've simplified the long file name).
- Select the option to install the driver (the second option, the first is to create files for your Linux distribution).
- Select auto mode
- After installation of driver will be asked to restart your computer - do not do it.
- In the console, type
sudo aticonfig --initial -f
- Restart the computer
Optional: When the computer does not start using a more powerful graphics card, you can manually run:
sudo aticonfig --px-dgpu
Strange errors? The computer detects that I am using the ATI Radeon HD7400, HD6370 when I have, but this is just a small detail not affecting the operation of the equipment.