> This is quite late to report, but I've just begun testing 3.12, and this
> patch makes my screen garbled when using the modesetting xorg driver.
>

Alright, after trying to notice what was different between the old and
new code, I've found the culprit :

-   gt->npage = pages;

There is no equivalent of this line with the new code. This must mess
things up.


By writing:

   gt->npage = gt->gem.size / PAGE_SIZE;

after:
   gt->npage = pages;

I don't experience the problem anymore. If this looks good to you, I'll
create a patch for this.



Thanks,

- Guillaume
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