Wake from sleep fan speed issue! High Sierra

[monsterz]

Hello everyone. I just finished building my first hack and so far everything runs perfectly. I'm running Coffee Lake on High Sierra. The only issue I'm left with is that the CPU fan, as well as all my case fans, stay at a very high speed once waking from sleep. I'm able to shutdown perfectly and have had no problems regarding restarting as well. The computer goes to sleep perfectly, but once I wake the system up all the fans start running at relatively high speeds, as if the initial boot up fan speeds are being overrode. When I check the i stat monitor it shows all fans are at 0 and in HWmonitor no fans are present.

*UPDATE*
It appears this issue within BIOS and is not just a hackintosh issue as many people have been posting about it in the Gigabyte forums. See posts below for updates.

 

[Michelinu]

Make sure you have the latest BIOS for your motherboard (F6b).
I had this issue until some days ago, when Gigabyte released F6b BIOS also for my motherboard similar to your (Z370XP SLI)

 

[winlog]

Hello everyone. I just finished building my first hack and so far everything runs perfectly. I'm running Coffee Lake on High Sierra. The only issue I'm left with is that the CPU fan, as well as all my case fans, stay at a very high speed once waking from sleep. I've been digging around on the forums trying to find some clues but I'm fairly new to everything so I'm having a bit of trouble sorting this out. I have read about custom USB injection but the process seems very foreign to me and I'm not positive that would even fix my issue. I'm able to shutdown perfectly and have had no problems regarding restarting as well. The computer goes to sleep perfectly, but once I wake the system up all the fans start running at relatively high speeds, as if the initial boot up fan speeds are being overrode. When I check the i stat monitor it shows all fans are at 0 and in HWmonitor no fans are present. Any help would be greatly appreciated!

Thanks

The same issue is here BIOS version is F6B. But still in HWmonitor no fans are present. Could you post your EFI folder to check where I missed something?

 

[monsterz]

The same issue is here BIOS version is F6B. But still in HWmonitor no fans are present. Could you post your EFI folder to check where I missed something?

I've heard of other people still dealing with this but everyone's hardware is different so I can only speak on what worked for me. I unplugged my Corsair link cable that was connected to my mobo and that stopped my issue is well. Not sure what type of cooler you have but if you have a Corsair with a Link cable I would give that a shot. My EFI folder is posted in my build thread if you'd like to take a look at it. Just click the link in my sig.

 

[Michelinu]

The same issue is here BIOS version is F6B. But still in HWmonitor no fans are present. Could you post your EFI folder to check where I missed something?

Did you install latest version of FakeSMC_LPCSensors.kext?

 

[monsterz]

Did you install latest version of FakeSMC_LPCSensors.kext?

Out of the blue I'm having the same exact issue again. I went in my BIOS to change something and change it back and all the sudden my fans are back to running full speed and HW monitor shows nothing. I have the FakeSMC kexts installed and from a reboot the fans are shown working but once put to sleep and woken the fans show 0 and run full speed. I just updated to the new F6c BIOS and that seemed to fix my issue. so strange what's happening with these BIOS updates.

 

[winlog]

Did you install latest version of FakeSMC_LPCSensors.kext?

yes. The newest version from here https://bitbucket.org/RehabMan/os-x-fakesmc-kozlek/downloads/

 

[winlog]

I just updated to the new F6c BIOS and that seemed to fix my issue.

Very strange... I started from F3 bios - the issue, updated to F5 - issue, F5b - issue, F6c - issue... Really don't know what is going on, but nothing help to solve it...

 

[Inkly]

I had a similar problem with the Gigabyte Z370M D3H with Coffee Lake 8100 i3 CPU. Upon booting the fans were fine, but anything after clover caused the fans to go full speed on both OSX and windows. Upgraded my BIOS to F4 and it solved my problem. Currently I'm running BIOS F5e and it's working beautifully.

 

[monsterz]

I had a similar problem with the Gigabyte Z370M D3H with Coffee Lake 8100 i3 CPU. Upon booting the fans were fine, but anything after clover caused the fans to go full speed on both OSX and windows. Upgraded my BIOS to F4 and it solved my problem. Currently I'm running BIOS F5e and it's working beautifully.

I updated to the F6c BIOS and everything was working smoothly, but I went in to change an irrelevant setting just to test the problem and it came right back. I’ve been reading about it on Gigabyte forums as well. I hope they fix it ASAP.