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    <body><span class="vcard"><a class="email" href="mailto:conselvan2@gmail.com" title="Ander Conselvan de Oliveira <conselvan2@gmail.com>"> <span class="fn">Ander Conselvan de Oliveira</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [HSW IPS] Black screen switching to a VT"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90617">bug 90617</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>[Haswell HD4400] Black screen switching to a VT
           </td>
           <td>[HSW IPS] Black screen switching to a VT
           </td>
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            <b><a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [HSW IPS] Black screen switching to a VT"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90617#c16">Comment # 16</a>
              on <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [HSW IPS] Black screen switching to a VT"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=90617">bug 90617</a>
              from <span class="vcard"><a class="email" href="mailto:conselvan2@gmail.com" title="Ander Conselvan de Oliveira <conselvan2@gmail.com>"> <span class="fn">Ander Conselvan de Oliveira</span></a>
</span></b>
        <pre>(In reply to Cesare Leonardi from <a href="show_bug.cgi?id=90617#c13">comment #13</a>)
<span class="quote">> Instead adding i915.enable_ips=0 to kernel command line works and resolve
> the problem for me.</span >

Looks very similar to <a class="bz_bug_link 
          bz_status_VERIFIED  bz_closed"
   title="VERIFIED FIXED - [BDW ips] Screen starts to flicker after I start X or back to console from X"
   href="show_bug.cgi?id=85583">bug 85583</a>. Could you give the following patch a try?

<a href="http://patchwork.freedesktop.org/patch/50675/">http://patchwork.freedesktop.org/patch/50675/</a></pre>
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