<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - DisplayPort always defaults to incorrect limited-range RGB on FullHD external display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108821">108821</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>DisplayPort always defaults to incorrect limited-range RGB on FullHD external display
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ari@adyline.sk
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=142540" name="attach_142540" title="Dmesg from boot">attachment 142540</a> <a href="attachment.cgi?id=142540&action=edit" title="Dmesg from boot">[details]</a></span>
Dmesg from boot
This report id follow up to discussion on reported (and fixed) bug
<a class="bz_bug_link
bz_status_CLOSED bz_closed"
title="CLOSED FIXED - DisplayPort always defaults to incorrect limited-range RGB on Intel Graphics for 24bpp+ displays"
href="show_bug.cgi?id=107476">https://bugs.freedesktop.org/show_bug.cgi?id=107476</a>
I'm actually running into the very same problem, but with already patched
kernel 4.18.16-200. I look into this several hours and seems to be similar
problem.
With resolution 1920x1080 color range is trimmed, but with lover resolution
(e.g. 1600x900), colors seems to be pretty fine.
I'm attaching requested dmesg log with drm.debug=0x1e parameter.
It's only problem with Display port, HDMI is working well.
I have also discrete ATI card, but this one is not attached to display port
(UEFI is preventing to use switcheroo), so always Intel card is in use.
Please let me know if you need any further data.
Thank you.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>