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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB Regression] Backlight is not adjustable and set at maximum level in kernels 3.16-rcX on HD 4000"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81515">81515</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[IVB Regression] Backlight is not adjustable and set at maximum level in kernels 3.16-rcX on HD 4000
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>rakothedin@gmail.com
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg CVS
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=103070" name="attach_103070" title="dmesg for kernel 3.16-rc5">attachment 103070</a> <a href="attachment.cgi?id=103070&action=edit" title="dmesg for kernel 3.16-rc5">[details]</a></span>
dmesg for kernel 3.16-rc5
[IVB Regression] Backlight is not adjustable and set at maximum level in
kernels 3.16-rcX on HD 4000. I tried a couple of release candidates without
luck. I checked /sys/class/backlight and found subfolder intel_backlight there.
However changing brightness manually does not result in any change of the
backlight level. For comparison, kernels 3.15 work just fine.
My hardware:
Laptop HP Envy 15 with hybrid intel\amd graphics:
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Chelsea LP [Radeon HD 7730M] (rev ff)
Software:
kernel 3.16-rc5
Mesa and libdrm are both from git
x-server is 1.16.0</pre>
</div>
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