juniorksl Posted August 16, 2016 Share Posted August 16, 2016 My CPU usage is extremely high while connected to AC power, the CPU usage then lowers when I unplug the power adapter from the laptop. Persistent logs while the AC power adapter is connected: 8/15/16 8:37:34.001 PM com.apple.CDScheduler[43]: *** LOG MESSAGE QUOTA EXCEEDED - SOME MESSAGES FROM THIS PROCESS HAVE BEEN DISCARDED *** 8/15/16 8:37:38.000 PM kernel[0]: ACPIBatteryManager: WARNING! fCurrentCapacity > fMaxCapacity. adjusted fCurrentCapacity from 3060, to 2329 8/15/16 8:37:38.559 PM powerd[52]: Failed to read current rating(0xe00002f0) Link to comment Share on other sites More sharing options...
Administrators Hervé Posted August 16, 2016 Administrators Share Posted August 16, 2016 Are you running with the Turbo disabler kext? Link to comment Share on other sites More sharing options...
Administrators Bronxteck Posted August 16, 2016 Administrators Share Posted August 16, 2016 on some machines there are bios options for things like that low power use during battery use. sometimes the options name does not imply it clearly though. Link to comment Share on other sites More sharing options...
juniorksl Posted August 16, 2016 Author Share Posted August 16, 2016 Are you running with the Turbo disabler kext? Yes Link to comment Share on other sites More sharing options...
juniorksl Posted August 16, 2016 Author Share Posted August 16, 2016 on some machines there are bios options for things like that low power use during battery use. sometimes the options name does not imply it clearly though. So are you suggesting it may be a setting in the BIOS causing the issue? Link to comment Share on other sites More sharing options...
Administrators Hervé Posted August 16, 2016 Administrators Share Posted August 16, 2016 What is it you're after exactly? If you don't want your CPU to run without Turbo modes (i.e. slower) when laptop is on battery, remove the Turbo disabler kext, then rebuild your cache. For the rest, I assume that you've generated your own CPU-specific SSDT using the well-known SSDT generator from Pike R Alpha and that your system runs with proper CPU power management/speedstep. Link to comment Share on other sites More sharing options...
juniorksl Posted August 16, 2016 Author Share Posted August 16, 2016 I want to fix the high CPU usage issue. The CPU usage is high when the power adapter is connected, it then lowers once it is disconnected. Link to comment Share on other sites More sharing options...
Administrators Hervé Posted August 16, 2016 Administrators Share Posted August 16, 2016 So you're talking about CPU utilisation, not CPU speed, right? What does your Activity Monitor show? did you install something that could always run in the background and grab CPU ? Which OS X version are you running by the way? Link to comment Share on other sites More sharing options...
Recommended Posts