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    <body><span class="vcard"><a class="email" href="mailto:martin.peres@free.fr" title="Martin Peres <martin.peres@free.fr>"> <span class="fn">Martin Peres</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Cannot control backlight intensity on Powerbook"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=31122">bug 31122</a>
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            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
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           <td style="text-align:right;">Status</td>
           <td>NEEDINFO
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           <td>NEW
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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Cannot control backlight intensity on Powerbook"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=31122#c10">Comment # 10</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Cannot control backlight intensity on Powerbook"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=31122">bug 31122</a>
              from <span class="vcard"><a class="email" href="mailto:martin.peres@free.fr" title="Martin Peres <martin.peres@free.fr>"> <span class="fn">Martin Peres</span></a>
</span></b>
        <pre>Nice to see a patch :)

However, this patch exposes a backlight even when there is no panel connected.
Could you come up with an heuristic to detect if there is or not a backlight?

The normal thing to do is to check in the GPIO table of the bios (check it out
using envytools's nvbios and nvagetbios).

I can assist a little for this.</pre>
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