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            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - Horizontal lines in radeon driver on kernel 3.15 and upwards"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=87682#c25">Comment # 25</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - Horizontal lines in radeon driver on kernel 3.15 and upwards"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=87682">bug 87682</a>
              from <span class="vcard"><a class="email" href="mailto:madeforspam@telfort.nl" title="Thom <madeforspam@telfort.nl>"> <span class="fn">Thom</span></a>
</span></b>
        <pre>AFAIK the patch is in since 4.7-RC4.
Could it be that your version is older ?

see also:
<a href="https://github.com/torvalds/linux/commit/9ef8537e68941d858924a3eacee5a1945767cbab">https://github.com/torvalds/linux/commit/9ef8537e68941d858924a3eacee5a1945767cbab</a></pre>
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