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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 --- - the external screen will become white and show nothing when switch screen to clone mode or external VGA only"
href="https://bugs.freedesktop.org/show_bug.cgi?id=58561">58561</a>
</td>
</tr>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Summary</th>
<td>the external screen will become white and show nothing when switch screen to clone mode or external VGA only
</td>
</tr>
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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>major
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>evawang@linpus.com
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=71843" name="attach_71843" title="intel_haswell_hotplug_vga_external_white_screen.log">attachment 71843</a> <a href="attachment.cgi?id=71843&action=edit" title="intel_haswell_hotplug_vga_external_white_screen.log">[details]</a></span>
intel_haswell_hotplug_vga_external_white_screen.log
When switch screen to clone mode(LCD+external VGA/HDMI) or external
mode(VGA/HDMI only) using the following command, the external screen will
become white and show nothing. attached log is error code. This only happens on
Lenovo Yx10 Sharkbay platform, Ivy bridge is OK.
Clone mode(LCD+external VGA): xrandr --output eDP1 --mode 1024x768
--output VGA1 --mode 1024x768(the shared resolution ratio of eDP and VGA)
External mode(VGA only): xrandr --output eDP1 --off --output VGA1
--mode 1366x768(the highest resolution ratio, it is different on different
computer)</pre>
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