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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - R9 380X (Tonga) SMC failure with pcie_dpm_key_disabled=0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94973">94973</a>
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<th>Summary</th>
<td>R9 380X (Tonga) SMC failure with pcie_dpm_key_disabled=0
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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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>jay@jcornwall.me
</td>
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<pre>Created <span class=""><a href="attachment.cgi?id=123000" name="attach_123000" title="dmesg from drm-fixes-4.6">attachment 123000</a> <a href="attachment.cgi?id=123000&action=edit" title="dmesg from drm-fixes-4.6">[details]</a></span>
dmesg from drm-fixes-4.6
HW is R9 380X in primary PCIe 3 slot on ASUS P8B75-V with three monitors
attached (2x DVI and 1 HDMI).
First observed in 4.5 when Powerplay was enabled by default. Trace of SMC
messages around failure from drm-fixes-4.6 kernel:
[ 9.666775] tonga_send_msg_to_smc(..., 0x145)
[ 9.666799] tonga_send_msg_to_smc(..., 0x146)
[ 9.666875] tonga_send_msg_to_smc(..., 0x5E)
[ 9.666895] tonga_send_msg_to_smc(..., 0x148)
[ 9.667775] tonga_send_msg_to_smc(..., 0x145)
[ 9.667800] tonga_send_msg_to_smc(..., 0x146)
[ 9.774079] [drm] fb mappable at 0xE0BAA000
[ 9.774083] [drm] vram apper at 0xE0000000
[ 9.774085] [drm] size 9216000
[ 9.774087] [drm] fb depth is 24
[ 9.774089] [drm] pitch is 7680
[ 9.774213] fbcon: amdgpudrmfb (fb0) is primary device
[ 9.774345] tonga_send_msg_to_smc(..., 0x5E)
[ 9.943267] Failed to send Message.
[ 10.112239] tonga_send_msg_to_smc(..., 0x145)
Other Powerplay functionality works correctly with pcie_dpm_key_disabled=1.</pre>
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