LinuxQuestions.org - Steam “GLX error” CentOS 7 with proprietary AMD video driver

Hello, everyone!
Could you help me to solve the problem? When steam starts it says:

"OpenGL GLX context is not using direct rendering, which may cause performance problems.
For more information visit https://support.steampowered.com/kb_...9938-EYZB-7457."

After installation CentOS 7 i've installed latest catalyst drivers:
1. Download and Install compat.

Code:

yum install compat-libstdc++-33-3.2.3-71.el7.i686.rpm

2. Download and install graphics driver from http://support.amd.com/en-us/downloa...os=RHEL+x86+64.

Code:

yum install fglrx64_p_i_c-15.302-1.x86_64_rhel7_64a.rpm

3.Reboot system and make:

Code:

aticonfig --initial

Next i have installed steam according this instruction:
http://negativo17.org/steam/

Code:

yum-config-manager --add-repo=http://negativo17.org/repos/epel-steam.repo

yum -y install steam

System:
AMD FX-9590
AMD RADEON R9 390
8 GB memory
OS:
CentOS 7 x64 (KDE)
Development tools Installed
EPEL repository enabled