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Revision 5985, 1.5 KB
(checked in by khali, 7 months ago)
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Major kernel version number was bumped to 3.
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| 1 | What is it? |
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| 2 | ----------- |
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| 3 | |
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| 4 | It unhides the SMBus of Intel ICH southbridges hidden on Asus P4B series |
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| 5 | and some other Asus and non-Asus systems. It is implemented as a shell |
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| 6 | script for kernel 2.6.5 and later: unhide_ICH_SMBus. |
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| 7 | |
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| 8 | It works with the following chips: |
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| 9 | * ICH2 (82801BA) |
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| 10 | * ICH2-M (82801BAM) |
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| 11 | * ICH3 (82801CA) |
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| 12 | * ICH3-M (82801CAM) |
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| 13 | * ICH4 (82801DB) |
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| 14 | * ICH4-M (82801DBM) |
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| 15 | * ICH5 (82801EB) |
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| 16 | |
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| 17 | ASUS switches off the SMBus PCI Device in the i801 ICH chip. I spoke twice |
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| 18 | with the German support and learned that: "We do not want the users to be |
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| 19 | irritated by just another PCI Device in the Win98 device manager." |
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| 20 | Really funny :-). |
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| 21 | |
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| 22 | Activation is normally handled by the code in drivers/pci/quirks.c in the |
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| 23 | kernel source. If the quirks code does not activate your SMBus, you may: |
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| 24 | |
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| 25 | * first of all, read the paragraph "Hidden ICH SMBus" in |
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| 26 | Documentation/i2c/busses/i2c-i801 in the kernel source. |
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| 27 | |
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| 28 | * check if you have kernel version from 2.6.16 to 2.6.19 |
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| 29 | If so, you need to disable ACPI sleep support and recompile kernel. |
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| 30 | If you don't use suspend try below instead of recompilation. |
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| 31 | |
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| 32 | * run as root the ./unhide_ICH_SMBus script. It will unhide the bus |
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| 33 | and load the i2c-i801 driver. Beware that you should then no longer |
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| 34 | use system suspend as bad things might happen on resume. |
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| 35 | |
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| 36 | * if above script works and you have latest kernel, you may |
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| 37 | try to fix the quirks.c, recompile and test your new kernel, |
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| 38 | and then submit a patch to us. Contact us if you need assistance. |
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