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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Backlight sysfs provided erroneously"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100148">100148</a>
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<th>Summary</th>
<td>Backlight sysfs provided erroneously
</td>
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<th>Product</th>
<td>DRI
</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
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>acc@sphalerite.org
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<p>
<div>
<pre>Hardware: MacbookPro8,2 (Late 2011)
Kernel: 4.9.13 from NixOS
Xorg: 1.19.2
i915 provides /sys/class/backlight/intel_backlight. This interface behaves
correctly except that it does not affect screen brightness at all, as this is
handled by gmux. The existence of the intel_backlight sysfs entry causes Xorg
to use that rather than gmux_backlight and stops xbacklight from working
correctly.</pre>
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</p>
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