<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 --- - [BayTrail] Linux console may not output after reboot."
href="https://bugs.freedesktop.org/show_bug.cgi?id=84309">84309</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>[BayTrail] Linux console may not output after reboot.
</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>rick.chen@atrustcorp.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86 (IA32)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI 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=106830" name="attach_106830" title="dmesg output when error occurred.">attachment 106830</a> <a href="attachment.cgi?id=106830&action=edit" title="dmesg output when error occurred.">[details]</a></span>
dmesg output when error occurred.
Linux 3.14.7/3.14.14
Baytrail CPU
Boot into linux without X, use console output to HDMIA1.
Sometimes ther is no display output after perform reboot[occurrance 1/10],
power on seems okay.
When there display not output, ttyS4 of HSUART is okay.
Use intel_reg_dumper to dump the register value to comapre normal and abnormal
situation:
DPLL_A_MD: 0x60ff2cdf (have output)
DPLL_A_MD: 0x70ff2ddf (no output)
DPLL_B: 0x60ff2cdf (disabled, dvo, VGA, TV A clock, unknown mode, p1 = 1, p2 =
0) (have output)
DPLL_B: 0x70ff2ddf (disabled, dvo, TV A clock, unknown mode, p1 = 1, p2 = 0,
using FPx1!) (no output)</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>