ASUS Zenbook UX391

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Fixing Screen Glitches

By default screen glitches will appear at some point, but the system is fully usable nevertheless. To fix this add intel_idle.max_cstate=4 to your boot options.

For grub you can edit /etc/default/grub, add intel_idle.max_cstate=4 to GRUB_CMDLINE_LINUX_DEFAULT and update grub with the new config.