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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Reported fan rpm is twice the actual value (NVC0)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78106">78106</a>
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
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<th>Summary</th>
<td>Reported fan rpm is twice the actual value (NVC0)
</td>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>mdop@seznam.cz
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Component</th>
<td>Driver/nouveau
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<th>Product</th>
<td>xorg
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=98224" name="attach_98224" title="Kernel log">attachment 98224</a> <a href="attachment.cgi?id=98224&action=edit" title="Kernel log">[details]</a></span>
Kernel log
I have Gigabyte GTX 560 Ti Ultra Durable (01:00.0 VGA compatible controller:
NVIDIA Corporation GF114 [GeForce GTX 560 Ti] (rev a1)) and Nouveau doesn't
report correct fan speed. Reported value is exactly twice the actual speed.
$ pacman -Q | grep nouveau
nouveau-dri 10.1.1-2
xf86-video-nouveau 1.0.10-2
$ sensors
...
nouveau-pci-0100
Adapter: PCI adapter
fan1: 6840 RPM
temp1: +31.0°C (high = +95.0°C, hyst = +3.0°C)
(crit = +105.0°C, hyst = +5.0°C)
(emerg = +135.0°C, hyst = +5.0°C)
...
When I follow Documentation/thermal/nouveau_thermal and the speed to 100%,
nouveau reports "fan1: 6840 RPM" while the highest reported RPM by Windows
(both Gigabyte tools and CPU-Z) is 3390 or 3420 RPM. Similar to when I set the
lowest speed (I have modified bios and my pwm1_min is 30) nouveau reports
"fan1: 3180 RPM" while Windows shows 1560 or 1590 RPM.
Could that be because the card has two physical fans? Reporting the speed of
single fan would make more sense IMHO.</pre>
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