Modify GRUB Boot Parameters to Disable Ryzen C-State Transitions

This procedure adjusts how the Linux kernel manages processor power states to prevent system resets during idle periods. Follow these steps carefully:

1. Open a terminal window and gain root access or use sudo to edit the GRUB configuration file: sudo nano /etc/default/grub
2. Locate the line beginning with GRUB_CMDLINE_LINUX_DEFAULT.
3. Within the existing double quotes, append the parameters idle=nomwait processor.max_cstate=5 at the end of the current string. Ensure there is a space separating these from the previous parameters.
4. Save the file by pressing Ctrl+O, then Enter, and exit the editor with Ctrl+X.
5. Apply the changes to the system bootloader by running: sudo update-grub
6. Reboot your laptop to initiate the new configuration.
7. Verify the stability of the system over the next several days of typical usage. If the resets no longer occur while the system is idling, the power management conflict is resolved.