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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - DRI_PRIME=1 and fullscreen issues"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=98146#c14">Comment # 14</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - DRI_PRIME=1 and fullscreen issues"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=98146">bug 98146</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>(In reply to Darek Deoniziak from <a href="show_bug.cgi?id=98146#c13">comment #13</a>)
[snips]
<span class="quote">> Tried updating drivers (using oibaf ppa all the time) and using single file
> with settings:
> Section "Device" 
>         Identifier      "Graphics"
>         Option          "DRI"   "3"
> EndSection

> How can I make sure that it is actually used?</span >

<span class="quote">> [     5.034] (II) intel(0): [DRI2] Setup complete
> [     5.034] (II) intel(0): [DRI2]   DRI driver: i965
> [     5.034] (II) intel(0): [DRI2]   VDPAU driver: va_gl
> [     5.034] (II) intel(0): direct rendering: DRI2 enabled</span >

DRI3 would be mentioned there as well (direct rendering: DRI2 DRI3 enabled).
Check your xorg.conf snippet is being loaded. You can check using
xf86-video-intel/tools/dri3info and/or glxinfo.</pre>
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