各位好，我最近碰到个头疼的问题，想过来请教下大家：

我的主板是B450 AORUS ELITE V2，通过这条命令确认的：

sudo dmidecode -t 2 | grep Product
    Product Name: B450 AORUS ELITE V2

目前我在主板仅有的3个风扇接口上接了4个PWM风扇，其中两个是用一分二的集线器连在同一个接口上的。

我已经用sensors-detect检测到了it8792芯片，查资料得知这个芯片确实是不少技嘉主板的标配，但现在用lm-sensors读取风扇转速时，所有风扇的转速都显示为0 RPM：

sensors it8792-isa-0a60
it8792-isa-0a60
Adapter: ISA adapter
in0:           1.79 V  (min =  +0.00 V, max =  +2.78 V)
in1:           1.29 V  (min =  +0.00 V, max =  +2.78 V)
in2:           1.18 V  (min =  +0.00 V, max =  +2.78 V)
+3.3V:         3.36 V  (min =  +0.00 V, max =  +5.56 V)
in4:           1.27 V  (min =  +0.00 V, max =  +2.78 V)
in5:           1.13 V  (min =  +0.00 V, max =  +2.78 V)
in6:           2.78 V  (min =  +0.00 V, max =  +2.78 V)  ALARM
3VSB:          3.33 V  (min =  +0.00 V, max =  +5.56 V)
Vbat:          3.10 V  
fan1:           0 RPM  (min =    0 RPM)
fan2:           0 RPM  (min =    0 RPM)
fan3:           0 RPM  (min ...

有没有朋友遇到过类似的情况？或者能给我一些排查方向的建议吗？

备注：内容来源于stack exchange，提问作者Pierre de LESPINAY