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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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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 --- - [915 Color] Intel Haswell GPU HD4400 has wrong color management on external screen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82829">82829</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>[915 Color] Intel Haswell GPU HD4400 has wrong color management on external screen
</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>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>timshel@rocketmail.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg CVS
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=104922" name="attach_104922" title="dmesg with drm.debug=0x0e of monitor with wrong colors">attachment 104922</a> <a href="attachment.cgi?id=104922&action=edit" title="dmesg with drm.debug=0x0e of monitor with wrong colors">[details]</a></span>
dmesg with drm.debug=0x0e of monitor with wrong colors
I have a weird graphic issue that if I connect my laptop to my external screen,
a Samsung PX2370, the colors on the external one have a low contrast and it
looks like if the gamma value is way to high. Black is grey and so on.
This happens independently if I use a VGA or digital connection via
Displayport.
In grub 2 and before KMS is started the background is in regular black but as
soon as KMS starts the backrgound becomes grey. If I disable KMS via the kernel
parameter "nomodeset" the booting shows normal contrast until X is started,
then everything is in low contrast again.
If I connect my laptop to another monitor the issue doesn't happen.
But the PX2370 can't be the only source of the issue since I never had this
problem before with my previous laptop and if I connect another PC to the
PX2370 and boot the same distribution the colors are also normal.
I am using openSUSE Factory with the following versions:
xf86-video-intel-2.99.914-1.1.x86_64
xorg-x11-server-7.6_1.16.0-4.1.x86_64
Mesa-10.2.5-89.1.x86_64
kernel-desktop-3.16.0-1.1.x86_64
My laptop is a T440s with a i7-4600U.
Let me know, if you need any additional information.</pre>
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