(In reply to intermediadc@hotmail.com from comment #9)
> Created attachment 129726 [details]
> xorg new
> 
> Hi Alex,
> making more tests changing totally my inside pci setting and . 
> no ring issue but xorg crash totally if i select the radeon. the only way

Let's start with the case where the kernel ring tests succeed.  What slot was
that?  The kernel driver needs to work correctly before we try anything else. 
Now, in the case where the kernel driver loads properly with no errors, what
happens next?  What do you mean by "xorg crash totally if i select the radeon"?
 segfault?  blank screen?  Something else?  Can you provide the xorg log when
this happens?