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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Invalid three-monitor setup configured for LVDS/DP/HDMI"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107650">107650</a>
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<th>Summary</th>
<td>Invalid three-monitor setup configured for LVDS/DP/HDMI
</td>
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<th>Product</th>
<td>xorg
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Driver/intel
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
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<th>Reporter</th>
<td>Simon.Richter@hogyros.de
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=141223" name="attach_141223" title="X log, three-monitor setup, DP port in HDMI mode (works)">attachment 141223</a> <a href="attachment.cgi?id=141223&action=edit" title="X log, three-monitor setup, DP port in HDMI mode (works)">[details]</a></span>
X log, three-monitor setup, DP port in HDMI mode (works)
When two external monitors supporting the same timings are connected, the
driver attempts to reuse a CRTC, however this fails if one is connected via DP
and the other via HDMI or DVI, as the DP link requires a different PLL setup.
xrandr handles this restriction, reporting an error from the CRTC setup (the
virtual CRTC 2 just reports failure), but on startup, this check is not
performed properly, and the X server starts up with two usable displays and one
confused monitor that will neither go to powersave nor show a picture.</pre>
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