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Re: Recent linux-image update broke CPU fan

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On Sun, 2015-11-29 at 02:16 -0500, Neal P. Murphy wrote:
> I think the last linux-image update broke my CPU fan. OK, it didn't
> actually break it. But since the last update, my CPU fan (stock with
> vishera 8350 black) will NOT turn faster than about 3500 RPM.
> 
> I have been using fancontrol for months. It took weeks to get it set
> correctly. At maximum speed, I've seen (and heard) the fan turn in
> excess of 6500 RPM.
> 
> Until the recent kernel update, the CPU and case fans have ramped up
> with increasing temp and ramped down with decreasing temp. The CPU
> never exceeded about 60C when compiling linux using all 8 CPUs for 5
> minutes. And that was with a mild overclock (4.4GHz, 1866 RAM at
> 2133).
> 
> Now, the CPU fan will not exceed about 3700 RPM. That's barely fast
> enough to keep 4 non-overclocked CPUs cool.
> 
> Has anyone else experienced this? Is it related to the kernel update?
> Or do I have a power supply or motherboard failing (again)?

If this was on a stable system it seems odd, if it was unstable or
testing it might just be one of the "charms" of running something that
is in development.

You need to figure out what package is responsible for the change, boot
the previous kernel for example. Then figure out if it's a bug or just
changed behaviour.

I'm not sure how fancontrol works. What exactly broke? Do you not get
readings from the temperature sensors, or is it not possible to control
the fan speed? 

-- 
Cheers,
Sven Arvidsson
http://www.whiz.se
PGP Key ID 6FAB5CD5

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Thread

Recent linux-image update broke CPU fan "Neal P. Murphy" <neal.p.murphy@alum.wpi.edu> - 2015-11-29 08:40 +0100
  Re: Recent linux-image update broke CPU fan Pascal Hambourg <pascal@plouf.fr.eu.org> - 2015-11-29 13:20 +0100
  Re: Recent linux-image update broke CPU fan Sven Arvidsson <sa@whiz.se> - 2015-11-29 14:40 +0100
    Re: Recent linux-image update broke CPU fan "Neal P. Murphy" <neal.p.murphy@alum.wpi.edu> - 2015-11-29 23:20 +0100
      Re: Recent linux-image update broke CPU fan Lisi Reisz <lisi.reisz@gmail.com> - 2015-11-30 13:20 +0100
        Re: Recent linux-image update broke CPU fan Sven Arvidsson <sa@whiz.se> - 2015-11-30 16:10 +0100
          Re: Recent linux-image update broke CPU fan Lisi Reisz <lisi.reisz@gmail.com> - 2015-11-30 19:40 +0100
            Re: Recent linux-image update broke CPU fan John Hasler <jhasler@newsguy.com> - 2015-11-30 20:10 +0100
            Re: Recent linux-image update broke CPU fan "Neal P. Murphy" <neal.p.murphy@alum.wpi.edu> - 2015-11-30 20:10 +0100
      Re: Recent linux-image update broke CPU fan Sven Arvidsson <sa@whiz.se> - 2015-11-30 16:10 +0100
    Re: Recent linux-image update broke CPU fan "Neal P. Murphy" <neal.p.murphy@alum.wpi.edu> - 2015-12-02 03:20 +0100

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