My motherboard, an ASUS P4B-LX has a W83627HF chip on it (as detected by sensors-detect) that has the sensor reading on it,and more importantly, allow control of the fan via PWM. However, the W83781D module does not work - it loads, but nothing happens. When i2c debugging message are enabled, it print the error message "Request of region 0x290-0x297 for w83781d failed", although it still loads. In /proc/ioports it shows "pnp 00:0d" at port 0x0295-0x0296 both with and without the module loaded. Forcing it gives the same error and results. Passing pnp_reserve_io=0x0290,8 in the command line has no effect, and no error message or acknowlegement about the parameter either, even with PNP Debug output. If PNP is disabled in the kernel, I can access the sensor, get the sensors readings, and control the fan.
