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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - GT650M and Nouveau - NOUVEAU(0): [drm] failed to set drm interface version."
   href="https://bugs.freedesktop.org/show_bug.cgi?id=91051#c15">Comment # 15</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - GT650M and Nouveau - NOUVEAU(0): [drm] failed to set drm interface version."
   href="https://bugs.freedesktop.org/show_bug.cgi?id=91051">bug 91051</a>
              from <span class="vcard"><a class="email" href="mailto:stu.axon@gmail.com" title="Stuart Axon <stu.axon@gmail.com>"> <span class="fn">Stuart Axon</span></a>
</span></b>
        <pre>Changing the intel driver to use SNA seems to have fixed the black window
problem AND the glitchyness in glxdemo when using DRI_PRIME=1


I followed advice here
<a href="https://ask.fedoraproject.org/en/question/32960/black-windows-in-gnome-3-suddenly/">https://ask.fedoraproject.org/en/question/32960/black-windows-in-gnome-3-suddenly/</a>

and set /etc/X11/xorg.conf to this below.

- anyone on optimnus having similar problems should probably try this.  - In
the meantime this bug can be closed.




Section "Device"
    Identifier "Intel Graphics"
    Driver "intel"
    Option "AccelMethod" "sna"
EndSection</pre>
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