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What difference between "VGA compatible controller" and "Display controller"?

Question asked by natasha on Apr 16, 2015

In my Lenovo IdeaPad G500A (59-381065) (openSUSE 13.1) I have the following graphics system:

Intel HD Graphics 4000 and AMD Radeon HD 8750M;

#  lspci | grep 'VGA\|ATI'

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)

01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8670A/8670M/8750M]

 

In forums.amd.com/Support of HD 8750M and linux drivers 14.501.1003 or beta the user with the same AMD GPU has

lspci | grep VGA

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8670A/8670M/8750M] (rev ff)

 

What difference between these two AMD cards, or, more generally, what difference between VGA compatible controller [0300] and Display controller [0380] PCI classes?

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