<html>
    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <body><span class="vcard"><a class="email" href="mailto:alex.haeussler@googlemail.com" title="Alexander <alex.haeussler@googlemail.com>"> <span class="fn">Alexander</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED --- - [sna gen4] corrupt rendering (and flickering on redraw)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=55500">bug 55500</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;">CC</td>
           <td>
                
           </td>
           <td>alex.haeussler@googlemail.com
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED --- - [sna gen4] corrupt rendering (and flickering on redraw)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=55500#c113">Comment # 113</a>
              on <a class="bz_bug_link 
          bz_status_ASSIGNED "
   title="ASSIGNED --- - [sna gen4] corrupt rendering (and flickering on redraw)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=55500">bug 55500</a>
              from <span class="vcard"><a class="email" href="mailto:alex.haeussler@googlemail.com" title="Alexander <alex.haeussler@googlemail.com>"> <span class="fn">Alexander</span></a>
</span></b>
        <pre>I'm also affected by this character corruption bug. My hardware is a notebook
with Intel 4500M (i915 driver). First I thought it's caused by a hardware issue
with my external screen, but the notebook screen shows the currupted characters
as well. Sometimes when I scroll down to the end of a website with text and
then keep scrolling (when the end is reached), about 2 characters per sentence
are corrupted and about every 1/10 second the position of the curruptions
change. The characters that were corrupted before look fine then and different
characters are corrupted.

What I have tried so far:

- Disable/enable xcompmgr (no effect)
- Use XFCE (no effect)
- Change driver options i915_enable_rc6, i915_enable_fbc, lvds_downclock (no
effect)
- Use different fonts (no effect)
- Disable sna (works)
- Test firefox, libreoffice, chromium (all affected)

Version Info:

Kernel 3.10.1-1-ARCH
xf86-video-intel 2.21.12</pre>
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the QA Contact for the bug.</li>
      </ul>
    </body>
</html>