Sanırım xorg.conf sonyası sorunlu hocam.
~ $ glxinfo | grep render
direct rendering: Yes
OpenGL renderer string: AMD Radeon HD 7660G
GL_KTX_buffer_region, GL_NV_blend_square, GL_NV_conditional_render,
GL_KTX_buffer_region, GL_NV_blend_square, GL_NV_conditional_render,
~ $ fglrxinfo
display: :1 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7660G
OpenGL version string: 4.3.12798 Compatibility Profile Context 13.35.1005
~ $ amdconfig --pxl
No layout section was found in the file: '/etc/X11/xorg.conf'.
Please run 'aticonfig --initial' first or modify your configuration file manually and run aticonfig again.
amdconfig: parsing the command-line failed.
~ $ cat /etc/X11/xorg.conf
Section "Device"
Identifier "Default Card 0"
BusID "PCI:0@0:1:0"
EndSection
Section "Device"
Identifier "Default Card 1"
BusID "PCI:1@0:0:0"
EndSection