[lm-sensors] [Bug?] W83697: Broken readings for fan speed 10% of the time

Grant Coady grant_lkml at dodo.com.au
Sat May 31 22:17:47 CEST 2008

On Sat, 31 May 2008 22:03:39 +0200, Bruno Prémont <bonbons at linux-vserver.org> wrote:

>On a Commell LE-365 I get readings for fan speed that are broken about
>10% of the time.
>The board has a Winbond W83697 chip (I can't check the exact chip name
>on the board as it's hidden by a heatsink, the photo from Commell, as
>as well as the manual indicate a HG, the kenrel reports:
>  [    3.572831] w83627hf: Found W83697HF chip at 0x290
>  [    3.572831] WDT driver for the Winbond(TM) W83627HF/THF/HG Super I/O chip initialising.
>  [    3.572831] w83627hf/thf/hg WDT: Watchdog already running. Resetting timeout to 60 sec
>  [    3.572831] w83627hf/thf/hg WDT: initialized. timeout=60 sec (nowayout=0)
>Below a sample (reformatted) output of
>  while sleep 1; do
>    date;
>    cat /sys/class/hwmon/hwmon0/device/fan1_input;
>  done

Try slowing down your polling, change to sleep 5.  See if the problem goes 


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