On Mon, 2012-05-21 at 16:07 -0400, James wrote: > On 05/21/12 14:11, Guenter Roeck wrote: > > On Mon, 2012-05-21 at 09:45 -0400, James wrote: > >> I use the nct6776-isa-0290 > >> Adapter: ISA adapter > >> > >> I have 3 fans: > >> 1. The CPU fan (about 3300 RPM) > >> 2. The rear case fan (about 1050 RPM) > >> 3. The front case fan (about 1350 RPM) > >> > >> Do the fans in Power Supplies typically get monitored? > >> > >> I have 6 fan connectors: > >> 1. Chassis fan connector (#12 on the motherboard) > >> 2. Chassis fan connector (#15 on the motherboard) > >> 3. Chassis fan connector (#2 on the motherboard) > >> 1. CPU fan connector (#6 on the motherboard) > >> 2. CPU fan connector (#5 on the motherboard) > >> 1. Power fan connector (#10 on the motherboard) > >> > >> Maybe someone can see a pattern. > >> > >> 1. I plugged the rear case fan in #12 > >> fan1 was 1060 RPM (the rear case fan probably) > >> fan2 was 3300 RPM (the CPU fan probably) > >> other fans reported 0 RPMs > >> > >> 2. I plugged the rear case fan in #2 > >> all fans reported 0 RPM > >> other fans reported 0 RPMs > >> > >> 3. I plugged the rear case fan in #12 and the front case fan in #15. > >> fan1 was 1053 RPM (the rear case fan probably) > >> fan2 was 3316 (the CPU fan probably) > >> other fans reported 0 RPMs > >> > >> 4. I plugged the rear case fan in #10 and the front case fan in #12. > >> fan1 was 1384 (the front case fan probably) > >> other fans reported 0 RPMs > > > > Problem is that ASRock uses a GPIO based multiplexer to connect the > > fans. So there is no 1:1 relationship between fans connectors and fan > > attributes. The GPIO pins used vary from board to board. > > > > There are some possibilities to support this, such as to modify the > > fancontrol script to also support setting gpio pins (if there is a gpio > > driver for the given HW), or to somehow implement the necessary support > > in the kernel. But those are all not really good solutions, and there > > are some questions if it can be made to work reliably in the first > > place. The AIDA64 folks tried to implement it but gave up (see > > http://forums.aida64.com/index.php?/topic/386-asrocks-fan-controller-sensor-trouble/), which is not a good sign. > > > > Guenter > > > > > > > It looks like I can get two fans. > So can I assume that there are two sensors for the 6 connectors and 3 are multiplexed for each sensor? > Is it correct that there are GPIO pins to switch which fan the sensor reads from? I really don't know details. Supposedly there is a .xml file somewhere in the ASRock software describing which connector is connected to which fan, and which fans are multiplexed. The NCT6776F has up to 5 fan inputs, so theoretically you could get up to 5 fans working. But then I have no idea which header connects to which fan input, and which headers are multiplexed. Guenter _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
