Hi Salah, > 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. The culprit isn't PNP itself but PNPACPI. The problem is known, see: http://bugzilla.kernel.org/show_bug.cgi?id=4014 Feel free to add a "me too" there so that the person responsible for it knows that it does annoy people. Not sure there is anything we can do though, as this is a BIOS bug. Ideally the motherboard manufacturer should release an updated BIOS. -- Jean Delvare
