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[madbiologist <969485@xxxxxxxxxxxxxxxxxx>]

Proper dynamic power management for your Radeon HD 4670 was introduced
in the 3.11 kernel (when used in conjunction with the appropriate
updated firmware files), which reduces temperature and fan noise.
Ubuntu 14.04 "Trusty Tahr" is based on the 3.13 kernel and includes the
necessary firmware files.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/969485

Title:
  Fan working non-stop

Status in The Linux Kernel:
  Expired
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  The fan is working non-stop while testing 12.04 Beta 2.

  Temperatures are being maintained around:

  Thermal 0: ok, 58.0 degrees C
  Thermal 1: ok, 48.0 degrees C
  Thermal 2: ok, 51.0 degrees C

  lsb_release -rd
  Description: Ubuntu precise (development branch)
  Release: 12.04

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-20-generic 3.2.0-20.33
  ProcVersionSignature: Ubuntu 3.2.0-20.33-generic 3.2.12
  Uname: Linux 3.2.0-20-generic x86_64
  NonfreeKernelModules: wl
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.95-0ubuntu1
  Architecture: amd64
  Date: Fri Mar 30 21:39:32 2012
  HibernationDevice: RESUME=UUID=ca289df0-21d9-4446-88e6-7a0e7970674c
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
  MachineType: Dell Inc. Studio XPS 1640
  ProcEnviron:
   TERM=xterm
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic root=UUID=60fe93c2-69d8-4f58-b5ea-b65e06e7b3c8 ro quiet splash vt.handoff=7
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/29/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A14
  dmi.board.name: 0Y536R
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A14
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A14
  dmi.modalias: dmi:bvnDellInc.:bvrA14:bd03/29/2010:svnDellInc.:pnStudioXPS1640:pvrA143:rvnDellInc.:rn0Y536R:rvrA14:cvnDellInc.:ct8:cvrA14:
  dmi.product.name: Studio XPS 1640
  dmi.product.version: A143
  dmi.sys.vendor: Dell Inc.

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