Hi, I have supermicro x8sil-f (latest bios/ipmi fw) with 2 fans and it has started to beep after a while when OS is up while it detected non-existing fans either run at 0 RPM or in -2560 RPM.
OpenBSD itself used to detect both fans (though lm1.fanX numbers were different to numbering from motherboard vendor). I replugged both fans on the board and OpenBSD has detected only one fan now. Why only one now, if it used to previously detected both? # sysctl hw.sensors.lm1 | grep fan ; ipmitool -I lanplus -H 192.168.1.250 -U ADMIN -P **** sensor list | grep '^FAN [1-2]' hw.sensors.lm1.fan1=1028 RPM FAN 1 | 955.000 | RPM | ok | 215.000 | 400.000 | 585.000 | 29260.000 | 29815.000 | 30370.000 FAN 2 | 1325.000 | RPM | ok | 215.000 | 400.000 | 585.000 | 29260.000 | 29815.000 | 30370.000 Could it be possible that openbsd lm driver messes something on the board and makes the board think a non-existing fan runs -2560 RPM or 0 RPM? After fans replug and OpenBSD detected only one fan, the board hasn't started to beep yet. I don't get it... OpenBSD 6.2-current (GENERIC.MP) #399: Fri Feb 2 18:28:58 MST 2018 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 8564375552 (8167MB) avail mem = 8297881600 (7913MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.6 @ 0x9f000 (68 entries) bios0: vendor American Megatrends Inc. version "1.1" date 05/27/2010 bios0: Supermicro X8SIL ... wbsio0 at isa0 port 0x2e/2: W83627DHG rev 0x25 lm1 at wbsio0 port 0xa10/8: W83627DHG Thank you for a tip or workaround. Jiri