Comment 0 for bug 1349176

lsb_release -rd
Description: Ubuntu 14.04.1 LTS
Release: 14.04

apt-cache policy i8kutils
i8kutils:
  Installed: 1.41
  Candidate: 1.41
  Version table:
 *** 1.41 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status

My CPU keeps overheating from time to time... the fan gear up and slow down in cycles and the lag makes the machine unusable, it's worst when I'm using Firefox to watch some Flash video (using the HTML5 player), but the problem also occurs when nothing special is running. During the lag htop doesn't show any process using all CPU capacity.
When I stop "sudo service i8kmon stop" and "sudo i8kfan 2 2" I get "-1 2" and everything goes back to normal.

The attached image is the psensor graph after logging in (passing lightdm).

My machine is a Dell Inspiron 17R SE 7720, with an GT650M video card (Optimus technology) that I'm using with Prime+nouveau.

Please let me know if any other information can be useful.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: i8kutils 1.41
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Jul 27 17:24:36 2014
InstallationDate: Installed on 2014-02-23 (154 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: i8kutils
UpgradeStatus: Upgraded to trusty on 2014-05-07 (81 days ago)
modified.conffile..etc.default.i8kmon:
 # /etc/default/i8kmon

 # Change to one to enable i8kmon
 ENABLED=1
mtime.conffile..etc.default.i8kbuttons: 2014-06-29T18:31:00.440067
mtime.conffile..etc.default.i8kmon: 2014-06-29T18:31:15.412067