No, that's why I built a slightly newer kernel, 4.4.0-68, so it won't
mess with the current release kernel, 4.4.0-66.

It's okay if don't want to test it, I already tested it on Precision
5520 at my hand.

The problem lies here is, 5520 has several different configs, I want to
make sure the patch works on your machine. Otherwise what's the point?

I assume the bluetooth symptom you saw mainly relates to the non-
matching firmware is still in the chip, a cold boot instead of warm
reboot should circumvent it.

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  No C-State Deeper than C3 utilized by Kaby Lake 7820HQ in Precision

Status in linux package in Ubuntu:
Status in linux source package in Xenial:

Bug description:
  My processor does not appear to be utilizing and idling states deeper
  than C3.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-66-generic 4.4.0-66.87
  ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
  Uname: Linux 4.4.0-66-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
   /dev/snd/controlC0:  carl       2446 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Mar 13 08:57:06 2017
   # This is a distribution channel descriptor
   # For more information see
  HibernationDevice: RESUME=UUID=65474558-ead3-4d66-85e5-b55f81978b88
  InstallationDate: Installed on 2017-03-09 (3 days ago)
  InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 
   lo        no wireless extensions.
   wlp2s0    no wireless extensions.
  MachineType: Dell Inc. Precision 5520
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-66-generic.efi.signed 
root=UUID=d19efcb8-515b-494c-a236-ee0da23f2393 ro acpi_rev_override locale=C 
quiet splash vt.handoff=7
   linux-restricted-modules-4.4.0-66-generic N/A
   linux-backports-modules-4.4.0-66-generic  N/A
   linux-firmware                            1.157.8
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install) 01/18/2017
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.1.3 0X41RR
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
dmi:bvnDellInc.:bvr1.1.3:bd01/18/2017:svnDellInc.:pnPrecision5520:pvr:rvnDellInc.:rn0X41RR:rvrA00:cvnDellInc.:ct10:cvr: Precision 5520
  dmi.sys.vendor: Dell Inc.

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