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    <body><span class="vcard"><a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> <span class="fn">Alex Deucher</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Corruption with DMA ring on cayman"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=60802">bug 60802</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Summary</td>
           <td>(bisect 8696e33f06b0c52195152cc6a0e3d52233f486c1) Kernel 3.8-rc7 breaks rendering on Radeon (confirmed on Cayman)
           </td>
           <td>Corruption with DMA ring on cayman
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Product</td>
           <td>DRI
           </td>
           <td>Mesa
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Component</td>
           <td>DRM/Radeon
           </td>
           <td>Drivers/Gallium/r600
           </td>
         </tr></table>
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        <div>
            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Corruption with DMA ring on cayman"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=60802#c5">Comment # 5</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Corruption with DMA ring on cayman"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=60802">bug 60802</a>
              from <span class="vcard"><a class="email" href="mailto:agd5f@yahoo.com" title="Alex Deucher <agd5f@yahoo.com>"> <span class="fn">Alex Deucher</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=60802#c4">comment #4</a>)
<span class="quote">> bisected and first bad commit is: 8696e33f06b0c52195152cc6a0e3d52233f486c1
> commit 8696e33f06b0c52195152cc6a0e3d52233f486c1
> Author: Alex Deucher <<a href="mailto:alexander.deucher@amd.com">alexander.deucher@amd.com</a>>
> Date:   Thu Dec 13 18:57:07 2012 -0500

>     drm/radeon: bump version for CS ioctl support for async DMA
>     
>     Signed-off-by: Alex Deucher <<a href="mailto:alexander.deucher@amd.com">alexander.deucher@amd.com</a>></span >

That just enables the use of DMA by the 3D driver, so the issue is in mesa. 
This looks like a duplicate of <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - corruption of text and bottom of screen in xonotic menus since 325422c49449acdd8df1eb2ca8ed81f7696c38cc"
   href="show_bug.cgi?id=60236">bug 60236</a>.</pre>
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