[lm-sensors] Problem with intel i7: not detected
matthieu.stigler at gmail.com
Sat May 8 11:35:15 CEST 2010
Thank a lot for taking time to answer to all my questions!! I will look
rather on the acpi side as you suggest!
Jean Delvare a écrit :
> Hi Matthieu,
> On Mon, 03 May 2010 21:18:33 +0530, mat wrote:
>> I have a Dell Studio 1557 with intel i7, installed with Ubuntu 9.10. As
>> many Dell Studio, it has the problem of overheating, reaching easily
>> temperatures of 80-90, sometimes even shutting down. Now, the fan does
>> not even start...
> That would most likely be an ACPI issue. Did you try upgrading your
> BIOS to the latest available version already?
>> I really have few knowledge of that, but I tried to get better insights
>> running lm-sensors, especially hoping to see whether the fan is
> Fans are almost never supported by lm-sensors on laptops. Except for
> integrated CPU sensors (coretemp driver), lm-sensors has to rely on
> ACPI for monitoring and that usually means a couple temperature values
> being reported and that's it.
> You may be able to use vendor-specific kernel modules though, such as
> thinkpad_acpi, eeepc-laptop etc. For some Dell laptops, there's the i8k
> driver, you should give it a try if you didn't already, but probably
> it's for older models.
>> sudo sensors-detect
>> I have:
>> Trying family `National Semiconductor'... Yes
>> Found unknown chip with ID 0x8502
> We don't know all Super-I/O chips out there. But not all of them
> include hardware monitoring features, especially on laptops, so the
> above isn't necessarily meaningful. The next investigation step would
> be to figure out which chip it is exactly, which means either taking
> your laptop apart and looking at all the chips, or asking the vendor.
> Not very appealing either way.
>> There was a similar post in the list:
>> But I don't really understand what was dealt there, and especially what
>> are the conclusions, especially:
>> -whether there is a way to have this chip detected
> The chip is already detected. It isn't identified though.
>> -whether this is likely to solve my problem of overheating /fan not working
> No, rather unlikely. What you want is to disassemble your ACPI tables
> (use acpidump) and have ACPI experts look at it. Maybe there's something
> wrong in there, that can be fixed by a BIOS update or worked around in
> the kernel.
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