On Wed, Sep 15, 2010 at 5:13 PM, Jean Delvare <khali@xxxxxxxxxxxx> wrote: > Hi Andrew, > > On Tue, 14 Sep 2010 09:52:12 +0100, Andrew Lyon wrote: >> I have a system with Supermicro X7DWA-N motherboard, according to the >> manual it has "Winbond W83627HF w/Hardware Monitor support: W83793" so >> I've loaded both the w83627hf and w83793 modules and several sensors >> and fans are detected, however when I try to control fan speed I find >> that the only pwm output which has any effect is pwm3 and it seems to >> control all of the fans at once, also pwm1 is locked at 112: > > What's the value of pwm1_enable? Could be that this PWM output is not > currently in manual control mode. The only devices with pwm and enable in the name are: /sys/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002f/temp1_pwm_enable /sys/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002f/temp2_pwm_enable /sys/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002f/temp3_pwm_enable /sys/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002f/temp4_pwm_enable /sys/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002f/temp5_pwm_enable All currently set to 2. > > Which kernel are you running? 2.6.34.7 > > The w83793 driver is still marked experimental, there could be a bug in > it. > >> >> ubermicro 0-002f # pwd >> /sys/devices/pci0000:00/0000:00:1f.3/i2c-0/0-002f >> ubermicro 0-002f # lspci | grep 1f.3 >> 00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus >> Controller (rev 09) >> ubermicro 0-002f # ls pwm? >> pwm1 pwm2 pwm3 pwm4 pwm5 pwm6 pwm7 pwm8 >> ubermicro 0-002f # cat pwm? >> 112 >> 0 >> 160 >> 0 >> 0 >> 0 >> 0 >> 0 >> >> >> ubermicro 0-002f # echo 0 >pwm3 >> ubermicro 0-002f # sensors | grep fan >> fan1: 1564 RPM (min = 712 RPM) >> fan2: 1652 RPM (min = 712 RPM) >> fan3: 1636 RPM (min = 712 RPM) >> fan4: 1638 RPM (min = 712 RPM) >> fan6: 2351 RPM (min = 712 RPM) >> fan7: 1622 RPM (min = 712 RPM) >> fan8: 1605 RPM (min = 712 RPM) >> >> ubermicro 0-002f # echo 140 >pwm3 >> ubermicro 0-002f # sensors | grep fan >> fan1: 1973 RPM (min = 712 RPM) >> fan2: 2089 RPM (min = 712 RPM) >> fan3: 2064 RPM (min = 712 RPM) >> fan4: 2051 RPM (min = 712 RPM) >> fan6: 2755 RPM (min = 712 RPM) >> fan7: 2048 RPM (min = 712 RPM) >> fan8: 2002 RPM (min = 712 RPM) >> >> >> Is it possible to gain control of the fans individually? > > Very unlikely. PWM signal routing to fans is a hardware thing, it's > been decided by your motherboard vendor and you have to live with it. > > Here I have an Asus server board with 8 fan inputs, 2 PWM output > controls, one controls the 2 CPU fans, and the other one controls the 6 > case fans. So it's similar to your board, only slightly better because > CPU fans have their own control. > > It is possible (but again unlikely) that the hardware vendor > implemented a user-controllable PWM routing. In that case it would > certainly be advertised by said vendor, and exposed in the BIOS or by > some custom tool. But I don't think I've ever seen this in practice. > And I don't think it would make too much sense (it would be cheaper to > route PWM outputs individually and group them at the software level if > needed.) > > -- > Jean Delvare > http://khali.linux-fr.org/wishlist.html > _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
