[Bug 78116] New: Auto fan speed management doesn't do anything in non critical temperature range (NVC0) - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 78116] New: Auto fan speed management doesn't do anything in non critical temperature range (NVC0)
Date: Wed, 30 Apr 2014 14:45:19 +0000	[thread overview]
Message-ID: <bug-78116-8800@http.bugs.freedesktop.org/> (raw)

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https://bugs.freedesktop.org/show_bug.cgi?id=78116

          Priority: medium
            Bug ID: 78116
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
           Summary: Auto fan speed management doesn't do anything in non
                    critical temperature range (NVC0)
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org
          Severity: enhancement
    Classification: Unclassified
                OS: All
          Reporter: mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

I have Gigabyte GTX 560 Ti Ultra Durable card. (Logs for this issue are same as
in Bug 78106)

1a) When I finish booting, nouveau selects AUTO mode (pwm1_enable: 2) and set's
the fan power to 55% (pwm1: 55).

1b) Enable manual mode, set pwm1 to 100, enable auto mode.

In both cases I would expect from the AUTO mode to lower PWM to go as low as
pwm1_min if the temperature is low enough. My card temperature is 31-33 °C but
pwm1 is never lowered in AUTO mode (neither from 55 or 100).

2) On Windows pwm goes as low as pwm1_min (which is 40 by default for GTX 560
Ti but it also works with my modded value of 30). I thought that Nvidia card
can manage it by itself (is it really done by operating system/software?).

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