This articles says that enabling SATA LPM [1] can reach deeper then C3. But since your laptop already reaches C8, I guess it won't help.
https://mjg59.dreamwidth.org/41713.html?thread=1748721 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1686448 Title: Unable to reach higher than package C2 state with Skylake processor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686448/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
