Supermicro Temp threshold

[r4ptor]

Im in need of some assistance in regards to the CPU temp threshold of my supermicro motherboards.

Useing the ipmitools on my linux laptop im trying to lower the CPU temp threshold. The issue is that the change is never acctually implemented.
Even though ipmitools says that the temp is changed, its actually never is.
Once the system is rebooted the old default values are back, but its only for the CPU temp threshold, every other threshold was changed correctly.

Has anyone experienced this before and is there a solution?

This issue is causing my case fans to only spin at 300rpm untill the CPU reaches 50C until they pick up speed to 500rpm instead. But 50C is for me to much, i want the fans to spin 100% when the cpu fan gets to 60C but now it looks like they only spin 100% when reaching the default CPU temp threshold of 104C.

 

[MiniKnight]

Maybe they SM support? It could be a firmware bug that's not saving and it'd help everyone if they fixed it. Did you try the newest ipmi firmware?

 

[r4ptor]

Ive spoken to them, 5 times now.
All they can say is: "Dont use third party fans, use our fans", "dont use third party ipmi software", "update your bios and firmware" etc.
Well the issue is on 3 different boards, x10, x11 and A2SDi so it cant be the bios or firmware bug, ive update firmware and bios just to be sure aswell.
One guy actually tried to help and said to try raw command which should work, but i dont know what that command should be, tried to google it but didnt find how it should be used.
Its the latest ipmi firmware in the linux repository, i even tried the latest ipmiutils on windows, but once the board is rebooted the default threshold is back.

 

[chinesestunna]

https://forums.servethehome.com/index.php?resources/supermicro-x9-x10-x11-fan-speed-control.20/

I believe this is a good place to start You should be able to modify the curve by lowering the upper threshold of 105C

 

[r4ptor]

https://forums.servethehome.com/index.php?resources/supermicro-x9-x10-x11-fan-speed-control.20/

I believe this is a good place to start You should be able to modify the curve by lowering the upper threshold of 105C

That page is great, it says that the fan headers are controlled by the CPU temp and so, which is great, but its not what im looking for unfortunately, its not the fans or their mode that are the issue, its the sensor threshold.

I want to lower the critical temperature threshold of the CPU to half of the default value in order for the fans to gradually increase the speed until it hit 100% when the temp is 50C.
As it currently is, the fans start to increase when the CPU temp is 50% and will only go 100% when the temp is 104C which is way to hot.

If you do have the raw command to lower the threshold of the cpu temp that would be very appreciated.

 

[chinesestunna]

this thread seems to be similar to what you're looking for - https://forums.servethehome.com/index.php?threads/setting-custom-ipmi-cpu-temp-thresholds.11092/
you can low the CPU temperature threshold as well, and fans should ramp PWM levels accordingly

 

[r4ptor]

this thread seems to be similar to what you're looking for - https://forums.servethehome.com/index.php?threads/setting-custom-ipmi-cpu-temp-thresholds.11092/
you can low the CPU temperature threshold as well, and fans should ramp PWM levels accordingly

Ive looked at that post earlier and the software says that the threshold for the cpu is changed, but they are never taken into effect, even though the new threshold is 50C and the temp is 55C the fans still only spins at 300rpm. In that moment they should go 100% but never does.
Also, once the system is rebooted the default value is restored back to 104C again.
This happens on 3 different boards aswell so its not an isolated case.

 

[i386]

Are you sure that you modified the correct sensor?
When I played with the tresholds I accidentaly set lower treshholds for chassis fans instead of cpu fans

 

[r4ptor]

Are you sure that you modified the correct sensor?
When I played with the tresholds I accidentaly set lower treshholds for chassis fans instead of cpu fans

yes im sure , i used the following command:
ipmitool -h <ip> -u <user> -p <password> sensor thresh "CPU Temp" upper 40 50 60

Id did work for every other threshold but not the CPU.

as for the ipmiutil, the command is similar but i dont remember it.

 

[wylie_uk]

i had issue with supermicro fans spinning fast then slow over and over (pulsing), it is related, I resolved... here's how.

Motherboard Supermicro H12dsi-nt6

the IPMI path is a no good unless your running some very old firmware (not recommended) in the latest firmware the critical low fan speed is hard coded, im guessing supermicro dont want people burning out stuff and blaming them


The issue for me was specifically the Noctua 120mm CPU fans, they have a very low min rpm and were triggering the critical low alert. - but it could be any fan doing it.



It wasn’t obvious which fans were causing the pulsing, as all the fans as a whole pulsed up and down when only one was critical, (BMC health logs help me track it down).


i used Arctic P14 Max chassis fans and Arctic P12 Max for CPU fans, these worked/scaled correctly without triggering a low critical alert and are quiet when low and good airflow when maxed.


Supermicro support informed me that the fan minimum speed cannot be less then 700RPM. they suggested (unoffically SILENT 14 PWM BLACK - Gelid Solutions - which does work but not very good airflow)


as a hack you could isolate the offending fan, and remove the 4th PWM wire. then that fan will run flat out all the time whilst the other fans will scale and mobo wont bitch.

 

[RolloZ170]

Useing the ipmitools on my linux laptop im trying to lower the CPU temp threshold.

change this can damage your CPU if you set higher, it is not taken even if you set lower safer values.

 

[bugacha]

the IPMI path is a no good unless your running some very old firmware (not recommended)

Total bollocks, old BMC runs just fine. You can still use latest BIOS which is the most important