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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 - Rx480 consumes 20w more power in idle than under Windows"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110865">110865</a>
</td>
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<th>Summary</th>
<td>Rx480 consumes 20w more power in idle than under Windows
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
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<th>Version</th>
<td>19.1
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Drivers/Gallium/radeonsi
</td>
</tr>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>mwolf@adiumentum.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=144485" name="attach_144485" title="logfiles as requested in the amd bugreport guide">attachment 144485</a> <a href="attachment.cgi?id=144485&action=edit" title="logfiles as requested in the amd bugreport guide">[details]</a></span>
logfiles as requested in the amd bugreport guide
First I am not sure where to file that bug, so please be gentle with me, if I
selected the wrong component.
I noticed for a while higher temperatures of my Videocard when my pc was just
idling with gnome. Then I dug deeper and found out that my "zero fan" videocard
does not stop the fan when I run Linux.
So I ran this line here:
watch -n 0.5 cat /sys/kernel/debug/dri/0/amdgpu_pm_info
and it showed me that the MCLK does not clock down to 300MHz as it does with
Windows 10.
GFX Clocks and Power:
2000 MHz (MCLK)
300 MHz (SCLK)
300 MHz (PSTATE_SCLK)
300 MHz (PSTATE_MCLK)
1000 mV (VDDGFX)
24.75 W (average GPU)
GPU Temperature: 45 C
GPU Load: 0 %
I have a multimonitor setup with two 1920x1200 pixel screens. When I use
Windows 10, the MCLK does not go beyond 300MHz when the desktop is idling.
(measured with hwmonitor)
When I power-off one screen under linux the (average GPU) goes down to 8-10W
and the MCLK drops to 300MHz, so the card can clock down, but is somehow
prohibited by the driver or configuration?
I followed this bug report guide from amd:
<a href="https://www.amd.com/en/support/kb/faq/amdgpu-installation#faq-Reporting-Bugs">https://www.amd.com/en/support/kb/faq/amdgpu-installation#faq-Reporting-Bugs</a>
and attached several logfiles.</pre>
</div>
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