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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Max pixel clock in EDID should be overridden by highest clock in mode descriptor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87508">87508</a>
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<th>Summary</th>
<td>Max pixel clock in EDID should be overridden by highest clock in mode descriptor
</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>All
</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>major
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Driver/intel
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
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<th>Reporter</th>
<td>adamvleggett@gmail.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<p>
<div>
<pre>I have a Sony XBR 4K TV connected to the Haswell Refresh graphics on my
i7-4790K. The following appears in the xorg log:
[ 9.308] (II) intel(0): Not using mode "4096x2160" (bad mode
clock/interlace/doublescan)
[ 9.308] (II) intel(0): Not using mode "4096x2160" (bad mode
clock/interlace/doublescan)
[ 9.308] (II) intel(0): Not using mode "3840x2160" (bad mode
clock/interlace/doublescan)
[ 9.308] (II) intel(0): Not using mode "3840x2160" (bad mode
clock/interlace/doublescan)
[ 9.308] (II) intel(0): Not using mode "3840x2160" (bad mode
clock/interlace/doublescan)
[ 9.308] (II) intel(0): Not using mode "3840x2160" (bad mode
clock/interlace/doublescan)
[ 9.308] (II) intel(0): Not using mode "3840x2160" (bad mode
clock/interlace/doublescan)
This seems to appear for no better reason than because the EDID claims a max
pixel clock of 165.0MHz.
If the EDID contains modes that exceed the EDID's own claimed max pixel clock,
the max pixel clock should be adjusted. This appears to be what the nVidia
proprietary driver does.</pre>
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