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From: Rudolf Marek <r.marek@assembler.cz>
To: lm-sensors@vger.kernel.org
Subject: Re: [lm-sensors] w83793 related question
Date: Wed, 22 Apr 2009 20:16:19 +0000	[thread overview]
Message-ID: <49EF7B13.8080505@assembler.cz> (raw)
In-Reply-To: <49E45712.6020906@aei.mpg.de>

Hi,

I have been thinking what it possibly could be. It seems like there might be two 
reasons:

1) the board is equipped with some kind of remote management conroller, which is 
also doing transactions on I2C

Is there some?

2) the SMM mode is doing its own i2c transactions, interfering with the driver.

The problem is that SMM iss transparent to OS.The only thing could possibly done 
is a BIOS change, or one could add some code to acquire global ACPI lock. It 
would require to modify the driver and add there those functions.

3) Make a driver more bullet proof. Maybe it would be possible somehow to force 
the driver to have a longer timeouts, more retries etc.

I would still need to know how often this problem  actually happens.


Thanks,

Rudolf

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  parent reply	other threads:[~2009-04-22 20:16 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-14  9:27 [lm-sensors] w83793 related question Carsten Aulbert
2009-04-19  9:11 ` Rudolf Marek
2009-04-20 10:21 ` Carsten Aulbert
2009-04-20 19:41 ` Rudolf Marek
2009-04-20 19:44 ` Carsten Aulbert
2009-04-20 20:40 ` Carsten Aulbert
2009-04-22 20:16 ` Rudolf Marek [this message]
2009-04-22 20:27 ` Carsten Aulbert
2009-04-22 20:57 ` Jean Delvare
2009-04-23  6:57 ` Rudolf Marek

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