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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Redundant nv_backlight created on Optimus enabled laptop."
href="https://bugs.freedesktop.org/show_bug.cgi?id=100922">100922</a>
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<th>Summary</th>
<td>Redundant nv_backlight created on Optimus enabled laptop.
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Driver/nouveau
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
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<th>Reporter</th>
<td>kai.heng.feng@canonical.com
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
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<pre>Original bug report:
<a href="https://bugs.launchpad.net/bugs/1683445">https://bugs.launchpad.net/bugs/1683445</a>
On Dell E6430, Optimus is enabled in BIOS settings, there are two backlights
interface being created: intel_backlight and nv_backlight. Changing brightness
in nv_backlight does nothing, intel_backlight is in charge here.
Userspace backlight control tools (unity-settings-daemon/gnome-settings-daemon)
will use nv_backlight on this laptop, because nouveau is card0 here.
Dived a little deeper, nv_backlight is created because
'connector->connector_type' is DRM_MODE_CONNECTOR_LVDS on this laptop.
Can we disable nouveau's backlight on Optimus laptop?</pre>
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