Hello to every one guys , i’m new on antergos and i have a problem with drivers .
I read the arch documentation for Catalyst and Open driver and i choose Open driver because i don’t want downgrade X to 1.17 .
I follow all the steps and the first time after reboot ,X doesn’t start . so i reinstall antergos and i followed a tutorial ( here ) and even with this seems that antergos doesn’t recognize the radeon .
When os boot up i can see an error line with the code -11
I don’t know what try now , can you help me?

I have antergos with gnome and as Laptop Lenovo G50-70 with intel processor and Radeon Graphics Card
Thanks in advance