At the moment ATI Radeon HD6470 hasn't working proprietary driver.
Open source driver works not well too: the card heats and cooler works very loud and notebook becomes hot.
I would like to use integrated Intel's video card until this problem be solved, but I don't know how to switch to it and if it will work well with external monitor through VGA port.
Ubuntu – Disable ATI Radeon HD6470 in Dell Vostro 3350 and use integrated Intel in core i5
atigraphicsintel graphicsradeonvga
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Best Answer
my case: Thinkpad T500: ATI HD3650 -> Intel
I think I did similar operation just minutes ago. First and foremost - simply switching option in the BIOS to 'Integrated' resulted in Ubuntu booting into command line only, without desktop.
I did the following to solve my problem (general outline):
For software switcher you may try the switcheroo https://help.ubuntu.com/community/HybridGraphics