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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Bad crtc detection on Radeon Pro WX 4100"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99744">99744</a>
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<th>Summary</th>
<td>Bad crtc detection on Radeon Pro WX 4100
</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>Other
</td>
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<th>OS</th>
<td>All
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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
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<th>Component</th>
<td>Driver/AMDgpu
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<th>Assignee</th>
<td>xorg-driver-ati@lists.x.org
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<th>Reporter</th>
<td>freedesktop@bluematt.me
</td>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
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<p>
<div>
<pre>Radeon Pro WX 4100 specs quoted from an AMD press release upon announcement
seem to indicate that it is capable of driving 4 4k monitors, however,
xrandr/Xorg will only allow it to drive 2 monitors at any one time
(irrespective of configured resolution).
xrandr --verbose lists each of the 4 MiniDP ports as "CRTCs: 0 1" and xrandr
--listproviders lists "Provider 0: id: 0x58 cap: 0xf, Source Output, Sink
Output, Source Offload, Sink Offload crtcs: 5 outputs: 4 associated providers:
0 name:POLARIS11 @ pci:0000:81:000".
Kernel 4.9.8
(haven't tested on Windows or anything else as those are generally not
available to test on this machine).</pre>
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