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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 - [Regression] Tonga can't bring up > 1 display since DC enablement"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107066">107066</a>
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<th>Summary</th>
<td>[Regression] Tonga can't bring up > 1 display since DC enablement
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>major
</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>
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<th>Reporter</th>
<td>lyude@redhat.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=140384" name="attach_140384" title="Aforementioned dmesg">attachment 140384</a> <a href="attachment.cgi?id=140384&action=edit" title="Aforementioned dmesg">[details]</a></span>
Aforementioned dmesg
Since DC got enabled for my GPU (R9 380 Tonga from Gigabyte, 22:00.0 VGA
compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Tonga PRO
[Radeon R9 285/380] [1002:6939] (rev f1)) I haven't been able to bring up more
then a single display at a time. More then one display usually results in at
least one display turning on, one other display possibly turning on but only
showing purple and another not turning on, or one display works and the other
two just don't come up at all. Additionally, my dmesg is filled with spam from
amdgpu (see attachment).
I've confirmed this still seems to be present in amdgpu's drm-next-4.19, and it
seems to be caused by the fact that none of the dc_states in the function
mentioned in the WARN_ON() actually have a stream assigned to them. I'm
currently swimming in a sea of bugs though, so any help would be appreciated
:).</pre>
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