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            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - xf86-video-ati Causes black stripes (RadeonHD4890 - r770)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=57990#c19">Comment # 19</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - xf86-video-ati Causes black stripes (RadeonHD4890 - r770)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=57990">bug 57990</a>
              from <span class="vcard"><a class="email" href="mailto:michel@daenzer.net" title="Michel Dänzer <michel@daenzer.net>"> <span class="fn">Michel Dänzer</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=57990#c16">comment #16</a>)
<span class="quote">> The older version was the version that comes installed with Ubuntu 12.04 by
> default (don't know how to see it).</span >

You should be able to look it up with 'apt-cache policy
xserver-xorg-video-radeon' or in /var/log/dpkg.log*.</pre>
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