(In reply to alex.vl from comment #31)
> Comment on attachment 142687 [details] [review] [review]
> Patch to workaround FATAL issue on VCE2.0 ringtest initialization .
> 
> Note: Its just workaround .
> 
> I see 2 problems :
>  - Issue with HW initialization. ( why VCE2.0 ringtest not pass ) 
>  - Driver-cleanup issue : cause ( Memory manager not clean during takedown.)

Likely a duplicate of bug 108608.  Have you tried the patch there (also
mentioned in comment 22)?