The problem arose when I installed the HD 7770 card instead of an older 7570 card.
I have tried everything and also other things to get a higher opengl performance. But in vain. Can anybody please help me to a solution to my problem.
What I did try was fiddling around with xorg.conf, changing DRI versions and various Drivers (radeon, ati). Is there a way to get the installed Mageia to resaearch for installed graphics cards?
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glxinfo | grep OpenGL
OpenGL vendor string: X.Org
OpenGL renderer string: AMD CAPE VERDE (DRM 2.50.0 / 4.13.8-desktop-1.mga7, LLVM 4.0.1)
OpenGL version string: 2.1 Mesa 17.2.3
OpenGL shading language version string: 1.30
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 2.0 Mesa 17.2.3
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.0.16
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From less /etc/X11/xorg.conf:
...
Section "Device"
Identifier "device1"
BoardName "ATI Radeon HD 6400 and later (radeon/fglrx)"
Driver "ati"
Option "DPMS"
Option "DRI" "3"
EndSection
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lspci -nnk | grep VGA -A2
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Cape Verde XT [Radeon HD 7770/8760 / R7 250X] [1002:683d]
Subsystem: XFX Pine Group Inc. Device [1682:3231]
Kernel driver in use: radeon