Messages in this thread | | | From | Simone Piunno <> | Subject | Re: 2.6.10-mm2: it87 sensor driver stops CPU fan | Date | Tue, 11 Jan 2005 22:04:59 +0100 |
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On Tuesday 11 January 2005 10:26, Jean Delvare wrote:
> What you have here is this default configuration, i.e. all fans are > supposedly off. Of course it isn't the case, I assume that your fans > are running at full speed when you turn your computer on.
Yes, thank you for your analisys.
> Additionally, the first fan control output was turned to manual PWM > control mode, full speed. The driver supposedly doesn't do that, I > guess you did it yourself through the sysfs interface?
Of course, sorry.
> > > Do you know what kind of it87 chip you do have? There are three of > > > them, IT8705F, IT8712F and a SIS950 clone (mostly similar to the > > > IT8705F). > See /sys/bus/i2c/devices/0-0290/name. If it says it8712 it's an IT8712F, > if it says it87 it is a less featured IT8705F or clone. After looking at
pioppo@roentgen ~ $ cat /sys/devices/platform/i2c-0/0-0290/name it87
> 2* I would then add a check to the it87 driver, which completely disables > the fan speed control interface if the initial configuration looks weird > (all fans supposedly stopped and polarity set to "active low"). This > should protect users of the driver who have a faulty BIOS.
If the driver can perform a similar guess, couldn't it also activate a reverse polarity mode as well? I think all systems boot with with full-speed fan, so any value you found at loading time should be the full-speed one, shouln't it?
BTW: I'm writing a report to giga-byte.
Cheers, Simone -- http://thisurlenablesemailtogetthroughoverzealousspamfilters.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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