[Solved] kernel_task high CPU after 15 mins of idle time

[kresbeatz]

Hello! I'm experiencing very strange problem on my Hackintosh under Sierra 10.12.4. Everything works great and very fast, but if I leave my computer for 15-20 minutes (with/without screensaver, display on/off, tried any combination) and come back after it performing super glitchy and slow, kernel_task in Activity Monitor shows somewhere around 100% for 10-15 seconds and after that computer again working super fast and fluid. It happens 100% after 10-15 minutes of idle time. If I leave Activity Monitor open after 15 minutes I see that kernel_task is only 5-7%, but as soon as I try to move the mouse or do something it skyrocket to 100% for 10 seconds, everything starts to be super slow and come back in normal state after these 10-15 seconds.

I disabled all the power-saving features (ticked 'Prevent computer for sleep', 'Wake for Ethernet access' and 'Enable Power Nap' in Energy Saver), double checked my BIOS settings:
VT-d > Disabled
IOAPIC 24-119 > Disabled
Legacy USB support > Auto
XHCI Hand Off > Enabled
Power on PCI - E/PCI > Disabled
Fast boot > Disabled
OS Type > Other OS
Hyperthreading, Speedstep and C-States > Auto (tried to enable and disable these - problem remains the same).

In MultiBeast I installed:
Quick Start > UEFI Boot Mode
Drivers > Audio > Realtek ALC1150
Drivers > Audio > 100/200 Series Audio
(Optional) Drivers > Disk > 3rd Party SATA
(Optional) Drivers > Misc > FakeSMC Plugins
(Optional) Drivers > Misc > FakeSMC HWMonitor Application
Drivers > Network > Intel > IntelMausiEthernet
Drivers > USB > Increase Max Port Limit

I downloaded SSDT.aml for i7-6700 and put it in EFI/CLOVER/ACPI/patched

I installed latest Nvidia Drivers (05f02). My monitor (Samsung 34" UltraWide) connected via DVI.

My config:
ASUS z170 Pro
i7-6700
Samsung SATA SSD's x5
MSI GTX980 Ti Gaming
External USB soundcard (RME Fireface UFX)

SMBIOS - iMac 14,2 (tried 17,1 - problem still exist). Clover arguments: -darkwake=0, dart=0
In ACPI there is patch (Rename HDAS to HDEF) and FixShutdown_0004 ticked (if I not tick this computer will restart instead of shutdown when this option is selected).

I installed Sierra following this guide and everything went smooth. I attached my config.plist file to this message. Please, if you know how to solve this problem - help me It's only one thing that is not working and driving me crazy

 

[P1LGRIM]

See https://www.tonymacx86.com/threads/...to-lag-freeze-for-a-couple-of-minutes.209661/

 

[kresbeatz]

Thank you. Finally what solved the problem was deleting com.apple.mediaanalysisd.plist

 

[Dave329]

Where can I find the com.apple.mediaanalysisd.plist file? I did not see it in my S/L/E. I appreciate if you can help.

 

[kresbeatz]

Where can I find the com.apple.mediaanalysisd.plist file? I did not see it in my S/L/E. I appreciate if you can help.

Check here:
/System/Library/LaunchAgents/com.apple.mediaanalysisd.plist

 

[Dave329]

Thanks! I deleted the file and at least had successful reboot. Will report back if this remedied the issue or not.

 

[Yoichiro]

Thank you for this post!!
I've troubled this for 7 months.
Just today, solved!

 

[kresbeatz]

Thank you for this post!!
I've troubled this for 7 months.
Just today, solved!

You're welcome

 

[richardpsic]

Thank you so much! it also resolved it for me. I also have a GTX 980Ti, maybe that's related?

Anyways, thank you for posting.

 

[kresbeatz]

Thank you so much! it also resolved it for me. I also have a GTX 980Ti, maybe that's related?

Anyways, thank you for posting.

Glad that helped I tried it with GTX 960 too and experienced same problem, so I suppose it's not GTX980Ti related. I think it's because some video files from other devices (not iPhones) with different/strange codecs that apple can't index. You can delete all of your videos from the iCloud library and see for yourself, I guess the problem will gone