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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - R9 285 weston hangs since drm/amd/pp: Fix bug that dpm level was not really locked"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105324">105324</a>
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<th>Summary</th>
<td>R9 285 weston hangs since drm/amd/pp: Fix bug that dpm level was not really locked
</td>
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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
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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>DRM/AMDgpu
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>adf.lists@gmail.com
</td>
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<pre>R9 285 Tonga, testing with amdgpu.dc=0 on agd5f 4.17-wip
Since
commit a02497b73218f10f237d98fb10d34d0baed607a0
Author: Rex Zhu <<a href="mailto:Rex.Zhu@amd.com">Rex.Zhu@amd.com</a>>
Date: Fri Feb 9 16:47:53 2018 +0800
drm/amd/pp: Fix bug that dpm level was not really locked
Lock the dpm levels when we use SW method to modify
the dpm tables directly to avoid a possible race
with the smu.
weston may hang display on start/quit/vt switch
SysRq works and logged will be errors like -
Mar 2 00:19:03 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:03 ph4 kernel: failed to send message 18b ret is 0
Mar 2 00:19:03 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:03 ph4 kernel: failed to send pre message 18a ret is 0
Mar 2 00:19:04 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:04 ph4 kernel: failed to send message 18a ret is 0
Mar 2 00:19:04 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:04 ph4 kernel: failed to send pre message 18c ret is 0
Mar 2 00:19:04 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:04 ph4 kernel: failed to send message 18c ret is 0
Mar 2 00:19:05 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:05 ph4 kernel: failed to send pre message 145 ret is 0
Mar 2 00:19:05 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:05 ph4 kernel: failed to send message 145 ret is 0
Mar 2 00:19:06 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:06 ph4 kernel: failed to send pre message 146 ret is 0
Mar 2 00:19:06 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:06 ph4 kernel: failed to send message 146 ret is 0
Mar 2 00:19:07 ph4 kernel: amdgpu: [powerplay]
Mar 2 00:19:07 ph4 kernel: failed to send pre message 148 ret is 0</pre>
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