Re: No sensors detected PE600SC

[Jean Delvare <khali@xxxxxxxxxxxx>]

On Tue, 19 Jun 2012 15:46:48 -0400, Graham Medlin wrote:
> Have a Dell PowerEdge 600sc running Ubuntu 12.04 Server. Hate to

Which kernel is that?

> retire the golden egg laying goose, its solid. The fan is running at
> 100%, sounds like a 747, so I wanted to check it with lm_sensors...
> 
> Running "sensors-detect" yields no for everything except:
>      ...
>      Do you want to scan for Super I/O sensors? (YES/no): y
>      Probing for Super-I/O at 0x2e/0x2f
>      Trying family `National Semiconductor/ITE'...               Yes
>      Found `Nat. Semi. PC8741x Super IO'
>          (no hardware monitoring capabilities)
>      ...
>      ...
>      Do you want to probe the I2C/SMBus adapters now? (YES/no): y
>      Using driver `i2c-piix4' for device 0000:00:0f.0: ServerWorks
> CSB6 South Bridge
>      Sorry, no sensors were detected.
>      ...
> 
> The CSB6 bus is listed as supported, but I haven't been able to track
> down what the sensors are.

This chip is how you may be able to access sensor chips, it is not a
sensor chip itself.

> Back when this was a Windows machine, I ran Everest Home, and it was
> able to read everything, and claimed LM81	and MAX1617A chips for
> whatever its worth...

Good news is that both are supported under Linux, so if that's really
what your system has, there is hope.

> Googling found exactly one reference claiming this was possible on a
> linux machine:
>      http://lists.us.dell.com/pipermail/linux-poweredge/2005-July/021985.html

This is a pretty old post, not sure everything said there still applies.

> 
> I tried with no luck:
>      modprobe -r i2c-piix4
>      modprobe i2c-piix4

The post said to pass force=1, but you did not.

> I'm not sure if its related, but "i2cdetect -l" returns nothing.

Do you have i2c-dev loaded? i2cdetect won't work without it. If you do
and "i2cdetect -l" still doesn't list the SMBus, please check the
kernel log when you try to (re)load i2c-piix4.

> Below is part of the output of "lspci -nn -vv"
>      00:0f.0 Host bridge [0600]: Broadcom CSB6 South Bridge [1166:0203] (rev a0)
>           Subsystem: Broadcom Device [1166:0201]
>           Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr+ Stepping- SERR+ FastB2B- DisINTx-
>           Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium
> >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
>           Latency: 32
>           Kernel modules: i2c-piix4, sworks-agp

Two drivers for the same device, looks wrong. You should try getting
rid of (via blacklisting) sworks-agp and see if it helps any.

-- 
Jean Delvare

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