https://bugs.freedesktop.org/show_bug.cgi?id=78106
Priority: medium
Bug ID: 78106
Assignee: nouveau@lists.freedesktop.org
Summary: Reported fan rpm is twice the actual value (NVC0)
QA Contact: xorg-t...@lists.x.org
Severity: normal
Classification: Unclassified
OS: Linux (All)
Reporter: m...@seznam.cz
Hardware: x86-64 (AMD64)
Status: NEW
Version: unspecified
Component: Driver/nouveau
Product: xorg
Created attachment 98224
--> https://bugs.freedesktop.org/attachment.cgi?id=98224&action=edit
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.
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