[Bug 78116] New: Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

[Bug 78116] New: Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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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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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #1 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
Hi Marcel,

Which version of the kernel are you using?

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #2 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
I'm using Arch Linux so I'm on the latest stable: 3.14.2 (3.14.2-1-ARCH).

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #3 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #2)
> I'm using Arch Linux so I'm on the latest stable: 3.14.2 (3.14.2-1-ARCH).

Hmm, OK. Can you confirm manual fan management works as expected?

I have just tried on my nvc4 and automatic fan management brings back my fan
speed to 40% from the 100% set manually.

As for your question about fan management being done by the hw or software, it
is always scaled in software (either in an RTOS running in the card or in the
kernel driver). In the fermi family, the first chipsets were actually using a
dedicated hardware chip for fan management (ADT7473) but your card is not one
of them. So, in our case, we run the code in the linux kernel but it will be
moved to the RTOS when I'm done pushing my patches to fix timers and when I
take the time to write the code for fan management.

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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--- Comment #4 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
Yes, manual control works and fan speed does change accordingly.

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #5 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #4)
> Yes, manual control works and fan speed does change accordingly.

Can you load nouveau with the following parameter and send us the kernel logs?

debug="PTHERM=debug"

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #6 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
Created attachment 98820
  --> https://bugs.freedesktop.org/attachment.cgi?id=98820&action=edit
dmesg with PTHERM=debug

Boot with debug parameter, after which I tried case 1b) (switching to manual
mode, changing pwm1 to 100 and switching back to automatic).

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #7 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
Thanks Marcel. Can I ask you for your vbios?

http://nouveau.freedesktop.org/wiki/DumpingVideoBios/

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #8 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
I already attached my bios to bug 78106 if that's ok.

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

--- Comment #9 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #8)
> I already attached my bios to bug 78106 if that's ok.

Great, thanks, I'll have a look at both bugs tomorrow :)

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

--- Comment #10 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #9)
> (In reply to comment #8)
> > I already attached my bios to bug 78106 if that's ok.
> 
> Great, thanks, I'll have a look at both bugs tomorrow :)

I can't reproduce the bug, but I'll send you a patch for us to get more
visibility on what's going wrong. Sorry for being so slow :s

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #11 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
Thanks for taking a look. I still have older card (GTX 260) so I can try that
(other disto too?) and maybe other cards as well. 
Can you confirm that it actually resets for you fan rpm to pwm 55 (or any other
low/default value) once auto mode is enabled and the previous state was
different/higher (say pwm 100)?

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #12 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #11)
> Thanks for taking a look. I still have older card (GTX 260) so I can try
> that (other disto too?) and maybe other cards as well. 

Well, you can try to check if they work but the point remains, your current
card doesn't work and it needs to be fixed.

> Can you confirm that it actually resets for you fan rpm to pwm 55 (or any
> other low/default value) once auto mode is enabled and the previous state
> was different/higher (say pwm 100)?

Yes, I confirm this. We'll check why it doesn't work on your card and fix it!

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #13 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
Seems that my old card - GTX 260 doesn't support manual mode nor does it report
any temperature/fan speed. 

[    0.491166] nouveau  [  PTHERM][0000:01:00.0] FAN control: none / external
[    0.491175] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
[    0.491179] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #14 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #13)
> Seems that my old card - GTX 260 doesn't support manual mode nor does it
> report any temperature/fan speed. 
> 
> [    0.491166] nouveau  [  PTHERM][0000:01:00.0] FAN control: none / external
> [    0.491175] nouveau  [  PTHERM][0000:01:00.0] fan management: automatic
> [    0.491179] nouveau  [  PTHERM][0000:01:00.0] internal sensor: yes

It doesn't surprise me. However, it should find an external temperature sensor
and fan management chip (the ADT7473), can you confirm that or paste your logs
here?

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #15 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
I put logs into separate bug 79204 not to clutter this not related issue.

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

--- Comment #16 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #15)
> I put logs into separate bug 79204 not to clutter this not related issue.

Perfect!

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--- Comment #17 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
Created attachment 99775
  --> https://bugs.freedesktop.org/attachment.cgi?id=99775&action=edit
drm/nouveau/therm/fan: add debug information in fan_update()

Please add this patch and send me the dmesg output (add the debug info for
ptherm).

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--- Comment #18 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
Created attachment 99782
  --> https://bugs.freedesktop.org/attachment.cgi?id=99782&action=edit
dmesg test after patch

I had to modify the patch a bit as in my source there were goto's instead of
returns (I'm not sure what's newer, I used the source in Arch Build System).
However it applied correctly as I checked.

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--- Comment #19 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
Created attachment 99790
  --> https://bugs.freedesktop.org/attachment.cgi?id=99790&action=edit
Please patch -p1 < additional_debug.patch

Hmm, seems like the problem is not where I thought it was. Let's see what's the
output with this patch applied!

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--- Comment #20 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
(In reply to comment #19)
> Hmm, seems like the problem is not where I thought it was. Let's see what's
> the output with this patch applied!

I cannot compile because of following error:

In file included from drivers/gpu/drm/nouveau/core/include/core/object.h:5:0,
                 from drivers/gpu/drm/nouveau/core/subdev/therm/base.c:25:
drivers/gpu/drm/nouveau/core/subdev/therm/base.c: In function
‘nouveau_therm_update’:
drivers/gpu/drm/nouveau/core/subdev/therm/base.c:136:25: error: ‘struct
nvbios_therm_fan’ has no member named ‘fan_mode’
    duty, priv->fan->bios.fan_mode);
                         ^
drivers/gpu/drm/nouveau/core/include/core/printk.h:14:45: note: in definition
of macro ‘nv_printk’
   nv_printk_(nv_object(o), NV_DBG_##l, f, ##a);                  \
                                             ^
drivers/gpu/drm/nouveau/core/subdev/therm/base.c:132:2: note: in expansion of
macro ‘nv_debug’
  nv_debug(therm, "nouveau_therm_update; mode = %d, poll = %d, "
  ^
  CC [M]  drivers/infiniband/ulp/ipoib/ipoib_cm.o
  CC [M]  drivers/infiniband/hw/qib/qib_ud.o
scripts/Makefile.build:308: recipe for target
'drivers/gpu/drm/nouveau/core/subdev/therm/base.o' failed
make[4]: *** [drivers/gpu/drm/nouveau/core/subdev/therm/base.o] Error 1
scripts/Makefile.build:455: recipe for target 'drivers/gpu/drm/nouveau' failed
make[3]: *** [drivers/gpu/drm/nouveau] Error 2
scripts/Makefile.build:455: recipe for target 'drivers/gpu/drm' failed
make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:455: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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--- Comment #21 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
Could you try using a 3.15-rcX kernel instead of a 3.14?

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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--- Comment #22 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
(In reply to comment #21)
> Could you try using a 3.15-rcX kernel instead of a 3.14?

It works correctly under 3.15-rc7 (fan starts at lowest pwm1 value and re-sets
after re-enabling auto mode) so I guess that it resolves this issue.

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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

--- Comment #23 from Emil Velikov <emil.l.velikov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
(In reply to comment #22)
> (In reply to comment #21)
> > Could you try using a 3.15-rcX kernel instead of a 3.14?
> 
> It works correctly under 3.15-rc7 (fan starts at lowest pwm1 value and
> re-sets after re-enabling auto mode) so I guess that it resolves this issue.

Most likely fixed with the following

commit dcd9262b3baf881285e9e0fd5459d54723cc992e
Author: Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Date:   Mon Mar 24 13:34:47 2014 +1000

    drm/nouveau/therm: check for sensor presence with requested mode, not
current


perhaps we can forward it to linus-stable ?

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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--- Comment #24 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
(In reply to comment #22)
> (In reply to comment #21)
> > Could you try using a 3.15-rcX kernel instead of a 3.14?
> 
> It works correctly under 3.15-rc7 (fan starts at lowest pwm1 value and
> re-sets after re-enabling auto mode) so I guess that it resolves this issue.

I'm glad it works! That means we fixed all the bugs you reported (with the
exception of the i2c issue that still needs to be pulled by Ben before I can
close it)? If so, I would like to thank you again for being an exemplary bug
reporter!

Sorry for being slow to answer to your bug reports though...

Should we close this bug now?

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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--- Comment #25 from Marcel Dopita <mdop-9Vj9tDbzfuSlVyrhU4qvOw@public.gmane.org> ---
Yep, switch it to appropriate state, please (I'm not sure if resolved is right
as it already was fixed in rc). I will recheck it once stable is out. Thanks
Martin

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[Bug 78116] Auto fan speed management doesn't do anything in non critical temperature range (NVC0)

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Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #26 from Martin Peres <martin.peres-Iz16wY1oaNPLSKGbIzaifA@public.gmane.org> ---
Closing this bug as fixed then!

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