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<th>Priority</th>
<td>medium
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - When laptop monitor is turned off it periodically turns on for a fraction of a second"
href="https://bugs.freedesktop.org/show_bug.cgi?id=75401">75401</a>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Summary</th>
<td>When laptop monitor is turned off it periodically turns on for a fraction of a second
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>grebator@gmail.com
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Product</th>
<td>DRI
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=94600" name="attach_94600" title="dmesg output when my laptop monitor is switched off">attachment 94600</a> <a href="attachment.cgi?id=94600&action=edit" title="dmesg output when my laptop monitor is switched off">[details]</a></span>
dmesg output when my laptop monitor is switched off
I have Lenovo W540 with Arch Linux. My laptop monitor slightly flashes every
three seconds when it's turned off. This happens every time either when I
connect an external display and turn off my laptop monitor or when I don't have
any external monitor connected and my laptop monitor turns off (e.g. when I
lock the screen). However, this doesn't happen in the opposite case when the
external monitor is turned off and my laptop monitor is turned on.
>From dmesg output I can see that a call to drm:ironlake_panel_vdd_off_sync is
initiated every three seconds and thus most probably this bug is related to
that call.</pre>
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