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            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - RS600: Texture alignment issues under Gnome Shell"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=35998#c40">Comment # 40</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - RS600: Texture alignment issues under Gnome Shell"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=35998">bug 35998</a>
              from <span class="vcard"><a class="email" href="mailto:alexdeucher@gmail.com" title="Alex Deucher <alexdeucher@gmail.com>"> <span class="fn">Alex Deucher</span></a>
</span></b>
        <pre>(In reply to Andrew Randrianasulu from <a href="show_bug.cgi?id=35998#c38">comment #38</a>)
<span class="quote">> unfortunately, running with RADEON_DEBUG=notiling gives no visible
> improvements.</span >

You have to disable tiling in the ddx as well in the device section of you xorg
config:
Option "ColorTiling" "false"</pre>
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