Confirmed on HD 7800 Series (using fglrx-updates)
$ fglrxinfo display: :0 screen: 0 OpenGL vendor string: Advanced Micro Devices, Inc. OpenGL renderer string: AMD Radeon HD 7800 Series OpenGL version string: 4.2.11986 Compatibility Profile Context
Confirmed on HD 7800 Series (using fglrx-updates)
$ fglrxinfo
display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7800 Series
OpenGL version string: 4.2.11986 Compatibility Profile Context