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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Regression backlight control broken on Dell XPS13 w/ kernel 4.7"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97295">97295</a>
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<th>Summary</th>
<td>Regression backlight control broken on Dell XPS13 w/ kernel 4.7
</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>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</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>bugs@mrvanes.com
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>I reported this bug on kernel bugzilla, but assumed it might be wise to inform
this bugtracker as well. On kernel 4.7 intel_backlight takes precedence over
acpi_video0 as backlight device, breaking backlight support on my IVB XPS13
again (1Hz pulsating brightness).
(New) Kernel bug: <a href="https://bugzilla.kernel.org/show_bug.cgi?id=151731">https://bugzilla.kernel.org/show_bug.cgi?id=151731</a>
(Old) Freedesktop bug: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Backlight control broken on Dell XPS13 w/ kernel 3.14-rc7"
href="show_bug.cgi?id=76276">https://bugs.freedesktop.org/show_bug.cgi?id=76276</a>
Quick solution is the same as in <a href="show_bug.cgi?id=97295#c15">comment #15</a>, hard-disable the initialisation
of intel_panel_setup_backlight in intel_panel.c</pre>
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