I tested on an KBL laptop and it did have the issue. Backport a patch
can make the machine idle to C10.
commit 3ce093d4de753d6c92cc09366e29d0618a62f542
Author: Len Brown <len.br...@intel.com>
Date: Wed Apr 6 17:00:59 2016 -0400
intel_idle: Add KBL support
KBL is similar to SKL
Signed-off-by: Len Brown <len.br...@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Please test the Xenial kernel: http://people.canonical.com/~khfeng/lp1672439/
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https://bugs.launchpad.net/bugs/1672439
Title:
No C-State Deeper than C3 utilized by Kaby Lake 7820HQ in Precision
5520
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