mirror of
https://github.com/lm-sensors/lm-sensors.git
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Jean Delvare
28a1677669
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5985 7894878c-1315-0410-8ee3-d5d059ff63e0
39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
What is it?
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-----------
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It unhides the SMBus of Intel ICH southbridges hidden on Asus P4B series
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and some other Asus and non-Asus systems. It is implemented as a shell
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script for kernel 2.6.5 and later: unhide_ICH_SMBus.
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It works with the following chips:
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* ICH2 (82801BA)
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* ICH2-M (82801BAM)
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* ICH3 (82801CA)
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* ICH3-M (82801CAM)
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* ICH4 (82801DB)
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* ICH4-M (82801DBM)
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* ICH5 (82801EB)
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ASUS switches off the SMBus PCI Device in the i801 ICH chip. I spoke twice
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with the German support and learned that: "We do not want the users to be
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irritated by just another PCI Device in the Win98 device manager."
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Really funny :-).
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Activation is normally handled by the code in drivers/pci/quirks.c in the
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kernel source. If the quirks code does not activate your SMBus, you may:
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* first of all, read the paragraph "Hidden ICH SMBus" in
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Documentation/i2c/busses/i2c-i801 in the kernel source.
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* check if you have kernel version from 2.6.16 to 2.6.19
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If so, you need to disable ACPI sleep support and recompile kernel.
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If you don't use suspend try below instead of recompilation.
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* run as root the ./unhide_ICH_SMBus script. It will unhide the bus
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and load the i2c-i801 driver. Beware that you should then no longer
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use system suspend as bad things might happen on resume.
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* if above script works and you have latest kernel, you may
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try to fix the quirks.c, recompile and test your new kernel,
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and then submit a patch to us. Contact us if you need assistance.
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