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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat May 3 14:31:55 PDT 2014


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

--- Comment #3 from Martin Peres <martin.peres at ensi-bourges.fr> ---
(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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