patoncito1, this bug report is being closed due to your last comment
regarding this being fixed with an update. For future reference you can
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** Description changed:

  Hi, I recently purchase a Benq laptop (joybook S57B) and I experience trouble 
with the high temperature of the cpu : the bios turn off the machine to prevent 
CPU overheating. I'm currently running kernel 2.6.32.10-generic which comes 
with lucid alpha2 (january-14). sensors-detect do not detects the cpu's fan.
  The cooling cpu fan seems do not work at all when the kernel boot, and that 
happened with all debian-like distro i tried (karmic, lenny, debian testing, 
knoppix). However i'd say that when i turn off the laptop the ubuntu logo 
remain on the screen (which is another bug i guess linked with this alpha 
release) and suddenly the fan is working...
- I found the reporting bug/451337 seems little similar but no same. May 
anybody found that same issue on that laptop in order to release a patch to 
solve it ? Regarding all the kernel i tried, I now considering that a best 
option will be to change the cpu cooling fan for another one compatible with 
the ubuntu hardware request. Can you please help me to solve that issue or 
provide advice on a model/brand for a new fan. Many thanks.
+ 
+ WORKAROUND:
+ sudo gedit /etc/default/grub
+ 
+ And then edit the line:
+ GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
+ 
+ into:
+ GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi.power_nocheck=1"
+ 
+ After that, just update your grub:
+ sudo update-grub
+ 
+ Reboot.
+ 
  ---
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     2982 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xfddf8000 irq 22'
     Mixer name : 'Realtek ALC269'
     Components : 'HDA:10ec0269,17ff0804,00100004 
HDA:11c11040,17ff0804,00100200'
     Controls      : 18
     Simple ctrls  : 10
  Card1.Amixer.info:
   Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfebec000 irq 17'
     Mixer name : 'ATI R6xx HDMI'
     Components : 'HDA:1002aa01,00aa0100,00100100'
     Controls      : 4
     Simple ctrls  : 1
  Card1.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [off]
  DistroRelease: Ubuntu 10.04
  LiveMediaBuild: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MachineType: BenQ Joybook S57
  Package: linux (not installed)
  ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/hostname.seed 
boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
  Regression: No
  RelatedPackageVersions: linux-firmware 1.34
  Reproducible: Yes
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  Tags: lucid kconfig needs-upstream-testing
  Uname: Linux 2.6.32-21-generic i686
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 04/16/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.04
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: Joybook S57
  dmi.board.vendor: BenQ
  dmi.board.version: Puma 3.5
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.04:bd04/16/2009:svnBenQ:pnJoybookS57:pvr1.04:rvnBenQ:rnJoybookS57:rvrPuma3.5:
  dmi.product.name: Joybook S57
  dmi.product.version: 1.04
  dmi.sys.vendor: BenQ

** Changed in: linux (Ubuntu)
   Importance: Medium => Low

** Changed in: linux (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/508674

Title:
  CPU cooling fan doesn't work at all on lucid

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