[Bug 1768976] Re: Ubuntu 18.04 is overheating after upgrade from 16.04

[Mauro]

I have the same heating issue after a clean install of Ubuntu 18.04.
Before that I was using Ubuntu 16.04, without this problem.

Fans are more active than before and the laptop is constantly
overheated, with 70-80 degrees doing nothing but only Chrome or even
with the shell opened.

Nvidia drivers has been removed (I can live with the integrated Intel).
Kworker issue (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793) already fixed.

This happens on a Samsung 7 Chronos NP700Z7C (CPU i7 3rd gen)

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https://bugs.launchpad.net/bugs/1768976

Title:
  Ubuntu 18.04 is overheating after upgrade from 16.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New
Status in xserver-xorg-video-nouveau package in Ubuntu:
  New

Bug description:
  Ubuntu is overheating at my laptop. Opening youtube on firefox is
  enough for critical temperature shutdown.

  Using lm-sensors for monitoring on 18.04 the temp varies between 70 and 85°C with only firefox or chrome open and doing nothing. 
  On my old 16.04 with same using, the temp varies between 55 and 70°C.

  First thought was the driver nouveau is the problem, and finally I was
  able to install by add "nouveau.modeset=0" at livecd boot options,
  without temp shutdown.

  After install I disable the nouveau at modprobe blacklist, but the
  system continues overheating and shutdown with basic usage.

  
  I have no idea what's happening with the bionic at my laptop.

  My laptop is a Samsung RF411 i5 2nd Generation and Geforce 540M.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.17
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Thu May  3 16:22:40 2018
  InstallationDate: Installed on 2018-04-27 (6 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: No upgrade log present (probably fresh install)
  VarLogDistupgradeAptHistorylog:
   Start-Date: 2018-04-27  15:46:02
   End-Date: 2018-04-27  15:46:02
  VarLogDistupgradeAptlog:
   Log time: 2018-04-27 15:45:39.753331
   Starting pkgProblemResolver with broken count: 0
   Starting 2 pkgProblemResolver with broken count: 0
   Done
   Log time: 2018-04-27 15:46:04.859979
  VarLogDistupgradeApttermlog:
   Log started: 2018-04-27  15:46:02
   Log ended: 2018-04-27  15:46:02

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