<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Backlight does not increase to maximum on Lenovo Yoga 2 Pro"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75085">75085</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>Backlight does not increase to maximum on Lenovo Yoga 2 Pro
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nico-freedesktop.org@schottelius.org
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>On the Lenovo Yoga 2 Pro, increasing the brightness to 100% using xbacklight,
does not increase it to the maximum (duh!).
How to reproduce:
# Find out maximal brightness
% cat /sys/class/backlight/intel_backlight/max_brightness
937
# Go to non 100%
% xbacklight -set 50
% cat /sys/class/backlight/intel_backlight/brightness
381
# Go to 100%
% xbacklight -set 100
% cat /sys/class/backlight/intel_backlight/brightness
765
# Increasing the brightness via sysfs actually increases the brightness even
more
% echo 937 > /sys/class/backlight/intel_backlight/brightness
Software/Hardware:
[11:26] artist:~% pacman -Q | grep -i -e xorg-server -e intel
intel-dri 10.0.3-1
xf86-video-intel 2.99.910-1
xorg-server 1.15.0-5
xorg-server-common 1.15.0-5
xorg-server-devel 1.15.0-5
xorg-server-xnest 1.15.0-5
[11:26] artist:~%
[11:26] artist:~% uname -a
Linux artist 3.12.9-2-ARCH #1 SMP PREEMPT Fri Jan 31 10:22:54 CET 2014 x86_64
GNU/Linux
[11:21] artist:~% lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated
Graphics Controller (rev 09)
[11:27] artist:~% lspci -n | grep 00:02.0
00:02.0 0300: 8086:0a16 (rev 09)
[11:27] artist:~%
CPU: Intel(R) Core(TM) i7-4500U</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>