I have been trying to get my dedicated graphics (AMD Radeon™ HD 8750M Graphics) working on my Samsung series 5 laptop. It just shows Intel® Ivybridge Mobile in the system details and gaming performance is much worse on the integrated card. Both fglrx and fglrx-updates broke unity completely. I don't mind using open source AMD drivers as long as I can activate my dedicated card (and preferably be able to switch to it only when gaming either manually or automatically). How can I activate my dedicated graphics?
Download the latest BETA drivers from the AMD website. Here's a link
Extract the file somewhere in your Home folder and make the file executable:
chmod +x amd_xxxxx.run
Install the drivers following an automatic setup. After the installation is complete make sure you run this command before restarting:
sudo aticonfig --initial
Restart you laptop and the ATI Catalyst drivers should be installed and working.
Remember that these are BETA drivers so you may encounter some issues. For more information about the drivers read here
Maybe this AMD page might help:
Perhaps you might be able to disable the integrated graphics in the BIOS. It might avoid confusion for the OS or graphics drivers.