Messages in this thread | | | Date | Wed, 19 Jan 2005 15:19:16 -0500 (EST) | From | Nicolas Pitre <> | Subject | Re: 2.6.10-mm2: it87 sensor driver stops CPU fan |
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On Mon, 10 Jan 2005, Jean Delvare wrote:
> When I get this, I'll compare with the datasheets so as to understand > how your chip is configured (or left unconfigured) by your BIOS. This > will both help me propose a workaround in the it87 driver and explain > the Gigabyte support what I think they should do.
FWIW, I have a Gigabyte motherboard with an it87 chip too. Reading about this it87 polarity thing I'm suspecting something is really wrong here:
When system is idle, the sensors report shows: CPU temp = +25°C and CPU fan = 2136 RPM (and rather noisy)
When system is 100% busy (with dd if=/dev/urandom of=/dev/null): CPU temp = +41°C and CPU fan = 1288 RPM (and obviously much quieter)
I'm running a 2.6.10 kernel (not -mm) so I guess the BIOS settings for fan control are not altered. And incidentally the BIOS has a setting called "smart fan control" set to "enabled" which maps to the ITxxF automatic PWM control mode I suppose. So if the BIOS actually set the fan polarity wrong then the fan would slow down when the temperature rises and vice versa, right?
Nicolas | |