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fuss:linux [2020/02/07 21:03] – [Allow Binding Privileged Ports] officefuss:linux [2020/02/25 05:07] – [Determining the Last Power On Method] office
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 will print the last wake-up type. will print the last wake-up type.
 +
 +====== Issues with Stuck Cores ======
 +
 +It may happen that logs fill up with messages indicating that some power management policy cannot be enforced on a given CPU core:
 +<code>
 +cpufreqd: cpufreqd_loop            : Cannot set policy, Rule unchanged ("none").
 +cpufreqd: cpufreqd_set_profile     : Couldn't set profile "Performance High" set for cpu4 (100-100-performance)
 +</code>
 +
 +It may be that the CPU core is simply stuck and may need replugging. The following two commands will take the CPU offline and the next one will start the CPU back up:
 +<code bash>
 +echo "0" > /sys/devices/system/cpu/cpu4/cpufreq/online
 +echo "1" > /sys/devices/system/cpu/cpu4/cpufreq/online
 +</code>
 +
 +In doing so, the power management issue seems to be resolved.
  
  
fuss/linux.txt · Last modified: 2024/02/21 06:47 by office
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