kernel_task always using above 100% CPU!

[MattMcHackit83]

Hi

The fans on my new build were (and are) constantly running very loud and fast. I installed HWMonitor and discovered my CPU is almost constantly running at the maximum turbo speed, 3.4GHz -- it does fluctuate but rarely drops below 2.9GHz. CPU cores are constantly between 60 and 73°C! On inspecting Activity monitor, I see kernel_task is constantly using 101-110% CPU. I assume I haven't properly implemented power management or have made another error in working with my ACPI files, but I'm not sure what.

Please see attached problem reporting files.

Any help would be appreciated!

 

[MattMcHackit83]

Temporarily removing ACPIBatteryManager.kext seems to have a pretty dramatic affect: the CPU moves between around 1.3 and 2.6GHz, rising about this only on very rare occasions, the CPU cores drop to around 38°C and the fans, of course, run much more slowly and quietly. I assume that means I am correct in thinking there is a problem with my ACPI/power management implementation? Obviously permanently removing ACPIBatteryManager.kext isn't a practical option!

Thanks in advance for any help.

 

[Feartech]

Temporarily removing ACPIBatteryManager.kext seems to have a pretty dramatic affect: the CPU moves between around 1.3 and 2.6GHz, rising about this only on very rare occasions, the CPU cores drop to around 38°C and the fans, of course, run much more slowly and quietly. I assume that means I am correct in thinking there is a problem with my ACPI/power management implementation? Obviously permanently removing ACPIBatteryManager.kext isn't a practical option!

Thanks in advance for any help.

your acpi/patched folder is wrong ssdt's with an x should not be in there

you only need a DSDT for your patching
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/post-950097

 

[MattMcHackit83]

your acpi/patched folder is wrong ssdt's with an x should not be in there

you only need a DSDT for your patching
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/post-950097

Tried removing the SSDTs with 'x' in the name and restoring ACPIBatteryManager.kext -- caused my AC adapter to stop being detected and the kernel_task issue (and CPU and fans) are unaffected
Restoring the SSDTs brings back the AC adapter detection.

 

[MattMcHackit83]

Please see updated problem reporting files attached.

 

[MattMcHackit83]

Have tried some more edits unsuccessfully. On studying the kernel log the only oddity I can see is that the following is repeated time and again:

2019-01-24 00:02:31.990789+0000 0x5d9      Default     0x0                  0      0    kernel: (kernel) ACPIBatteryManager: WARNING! fMaxCapacity > fDesignCapacity. adjusted fMaxCapacity from 3118, to 3100
2019-01-24 00:02:31.990792+0000 0x5d9      Default     0x0                  0      0    kernel: (kernel) ACPIBatteryManager: WARNING! fCurrentCapacity > fMaxCapacity. adjusted fCurrentCapacity from 3118, to 3100

I think I'm pretty out of my depth. I've tried a couple of possible fixes unsuccessfully. @RehabMan could you take a look, please?

 

[fivos1996]

Hi

The fans on my new build were (and are) constantly running very loud and fast. I installed HWMonitor and discovered my CPU is almost constantly running at the maximum turbo speed, 3.4GHz -- it does fluctuate but rarely drops below 2.9GHz. CPU cores are constantly between 60 and 73°C! On inspecting Activity monitor, I see kernel_task is constantly using 101-110% CPU. I assume I haven't properly implemented power management or have made another error in working with my ACPI files, but I'm not sure what.

Please see attached problem reporting files.

Any help would be appreciated!

See here. You may have this problem.
https://www.tonymacx86.com/threads/solved-patched-applehda-maxing-out-cpu-utilization.211829/

 

[MattMcHackit83]

See here. You may have this problem.
https://www.tonymacx86.com/threads/solved-patched-applehda-maxing-out-cpu-utilization.211829/

Thanks, not sure that fits, though? I'm using AppleALC and Lilu for audio, and the problem seems pretty explicitly tied to ACPIBatteryManager -- when it's uninstalled, the problem goes away but, of course, then I have no battery status...

 

[MattMcHackit83]

The problem seems to be a bug in my DSDT battery methods, but I don't have the skill or knowledge to fix it. Anybody ever have a similar problem? Anyone skilled with ACPI files? I'd really appreciate any help! Thank you!

 

[MattMcHackit83]

Attached new problem reporting files following another unsuccessful attempt to solve this issue.