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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [DC] Polaris10: Missing modes when enabling DC"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109238">109238</a>
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<th>Summary</th>
<td>[DC] Polaris10: Missing modes when enabling DC
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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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>DRM/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>rocketraman@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>alex3kov@zoho.com, cousinmarc@gmail.com, dri-devel@lists.freedesktop.org, fdsfgs@krutt.org, freedesktop-bugzilla@dominik-paulus.de
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<th>Depends on</th>
<td>103953
</td>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=142991" name="attach_142991" title="Xorg.0.log with modesetting">attachment 142991</a> <a href="attachment.cgi?id=142991&action=edit" title="Xorg.0.log with modesetting">[details]</a></span>
Xorg.0.log with modesetting
+++ This bug was initially created as a clone of <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [DC] Polaris10: Missing modes when enabling DC"
href="show_bug.cgi?id=103953">Bug #103953</a> +++
I have 3 Dell WQHD Screens (2560x1440) screens, connected to a Radeon RX580
(XFX, RX-580 GTS Black Edition, 1425 MHz 8GB).
My kernel is:
Linux edison 4.19.13-300.fc29.x86_64 #1 SMP Sat Dec 29 22:54:28 UTC 2018 x86_64
x86_64 x86_64 GNU/Linux
With the default boot settings, which enable amdgpu.dc, I am unable to get the
native resolution on one of the three monitors.
If I disable amdgpu.dc on the kernel command line, I am able to get the native
resolution on all three monitors.
I have attached the Xorg.0.conf.old from the startup with amdgpu.dc at the
default setting, and Xorg.0.conf from the startup with amdgpu.dc=0.
I have also attached the initial part of the dmesg log from both boots:
dmesg-amdgpudcdefault.log : default amdgpu.dc setting (enabled)
dmesg-amdgpudc0.log : amdgpu.dc=0
The only relevant difference I see between the two is that with modesetting, I
see the following errors:
edison kernel: amdgpu: [powerplay] Failed to retrieve minimum clocks.
edison kernel: amdgpu: [powerplay] Error in phm_get_clock_info
whereas without modesetting I do not see those errors.</pre>
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</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [DC] Polaris10: Missing modes when enabling DC"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103953">Bug 103953</a>] [DC] Polaris10: Missing modes when enabling DC
</li>
</ul>
</div>
<br>
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