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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
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</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - KDE 4 with xf8x-video-intel 2.21.14 can't set the brightness."
href="https://bugs.freedesktop.org/show_bug.cgi?id=68394">68394</a>
</td>
</tr>
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
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<th>Summary</th>
<td>KDE 4 with xf8x-video-intel 2.21.14 can't set the brightness.
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>alexkaltsas@gmail.com
</td>
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<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>7.7 (2011)
</td>
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<th>Component</th>
<td>Driver/intel
</td>
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<th>Product</th>
<td>xorg
</td>
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<p>
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<pre>Created <span class=""><a href="attachment.cgi?id=84406" name="attach_84406" title="Xorg log, Vbios dump, Xrandr output, Intel reg dump files.">attachment 84406</a> <a href="attachment.cgi?id=84406&action=edit" title="Xorg log, Vbios dump, Xrandr output, Intel reg dump files.">[details]</a></span>
Xorg log, Vbios dump, Xrandr output, Intel reg dump files.
After upgrading to xf86-video-intel to 2.21.14 KDE can no longer control the
brightness. It display the brightness level info, but no change. Downgrading to
2.21.13 solves the issue.
issuing as root:
echo _value_ > /sys/class/backlight/intel_backlight/brightness
changes the brightness.
_value_: 0 to 4882
Extra info: <a href="http://forum.kde.org/viewtopic.php?f=225&t=117153">http://forum.kde.org/viewtopic.php?f=225&t=117153</a>
chipset: VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
kernel driver: i915
uname -r: 3.10.7-1-ARCH
uname -m: i686
xf86-video-intel: 2.21.14
Xorg -version: X.Org X Server 1.14.2, Release Date: 2013-06-25
mesa: 9.1.6
libdrm: 2.4.46
Distro: Arch Linux
Display: LVDS
Laptop model: Dell Inspiron 411z-6733</pre>
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