Fri, 9 Feb 2018 07:45:40 -0500 Jiri B <ji...@devio.us>
> 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.

Hi Jiri,

Does a manual restart of the BMC card (via IPMI) make a difference, how?

Kind regards,
Anton Lazarov

> 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
> 

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