<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 - LVDS blank screen on GM45"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94825">94825</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>LVDS blank screen on GM45
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</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>rob@solution-space.com
</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=122709" name="attach_122709" title="Boot log #1">attachment 122709</a> <a href="attachment.cgi?id=122709&action=edit" title="Boot log #1">[details]</a></span>
Boot log #1
[This is extracted the from the mailing list thead here:
<a href="https://lists.freedesktop.org/archives/dri-devel/2016-April/104142.html">https://lists.freedesktop.org/archives/dri-devel/2016-April/104142.html</a>]
My setup is an embedded GM45 based board with a screen connected via 24
bit LVDS. After boot to console (no X), the screen is blank. Initially tested
on kernel 3.14.57, but the same happens on 4.5. This report uses kernel 4.5.0.
Older, pre-KMS versions of the kernel worked fine.
In the BIOS, the panel type is configured as "<a href="mailto:1920x1080@148.5M">1920x1080@148.5M</a>".
Attached boot log #1 includes Ville's patch "drm/i915: Read timings from the
correct transcoder in intel_crtc_mode_get()" but this code is not touched here
because the driver chooses to use the VBT mode.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>