Comment 12 for bug 184721

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dino99 (9d9) wrote :

wonder about the actual kernel settings as asus_acpi is blacklisted (oneiric)
found this on: http://en.gentoo-wiki.com/wiki/Asus_P5W_DH_Deluxe

For kernels 2.6.31 and above the w83627ehf driver conflicts with ACPI. The asus_atk0110 driver should be used instead.

To prevent ACPI from stealing I/O ports, and then reuse the w83627ehf driver and restore the old behavior (which might be dangerous), add acpi_enforce_resources=lax to the kernel cmdline when booting.
Warning: You MUST understand that using the old behavior can be harmful for your hardware. Actually, having two drivers working on the same I/O ports can set unattended values to voltage controls.
Note: Using the asus_atk0110 gives nice results for reading/monitoring, but this driver does not have any fan control ability. Also, at least sys-apps/lm_sensors-3.1.0 is required to support this driver (current stable portage version is 3.1.2)