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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#c20">Comment # 20</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:ruben.reina.dev@gmail.com" title="Rubén Reina <ruben.reina.dev@gmail.com>"> <span class="fn">Rubén Reina</span></a>
</span></b>
        <pre>Sorry for the delay.

I've desactivated colortiling2d and the problem persists and apt-cache policy
xserver-xorg-video-ati gives me this:

xserver-xorg-video-ati:
  Installed: 1:7.0.0+git1212071424.793e1b~gd~p
  Candidate: 1:7.0.0+git1212121401.3c7d02~gd~p
  Version table:
     1:7.0.0+git1212121401.3c7d02~gd~p 0
        500 <a href="http://ppa.launchpad.net/oibaf/graphics-drivers/ubuntu/">http://ppa.launchpad.net/oibaf/graphics-drivers/ubuntu/</a>
precise/main amd64 Packages
 *** 1:7.0.0+git1212071424.793e1b~gd~p 0
        100 /var/lib/dpkg/status
     1:6.14.99~git20111219.aacbd629-0ubuntu2 0
        500 <a href="http://es.archive.ubuntu.com/ubuntu/">http://es.archive.ubuntu.com/ubuntu/</a> precise/main amd64 Packages</pre>
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