I've almost gone crazy with the system random freezes!

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The likelihood of recent system freezes has reduced significantly, but it still occurs at night. It seems that disabling C6 through software during boot isn’t a complete solution.

Through some further searches, I found the following articles: ADM Ryzon processor random “freeze” issue, AMD Ryzen CPU random “freeze”, AMD Ryzen 2700X + CentOS 7 random freeze problem.

Based on various descriptions in those articles, the solution is as follows:

  1. If your BIOS supports disabling CPU power management, you should do so in the BIOS.
  2. Add idle=nomwait to the kernel parameters.
  3. Add processor.max_cstate=1 intel_idle.max_cstate=0 to the kernel parameters.
  4. After updating the kernel parameters, manually execute sudo update-grub to update the configuration.

You can check the max_cstate value with the following command before making changes; the value is 9 by default.

cat /sys/module/intel_idle/parameters/max_cstate

Modify the kernel boot parameters by using sudo nano /etc/default/grub.

You can view the kernel boot parameters using cat /proc/cmdline.

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