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Excessive Fan Speed during "normal" operation of HP Pav. zv5000

Hello :)

Thank you for reviewing my request :)

The laptop: HP Pavilion zv5000

The issue:

I'm worried my processor is being cooked alive ever since I created a dual-boot on this machine. Using the GRUB boot loader, I can now boot into either Windows XP OR Ubuntu (an open source operating system that is, technically, a flavor of LINUX).

What's been happening:

Ever since I created the dual-boot (which I believe I did correctly), I don't believe the processor clocking speed has been managed correctly - especially when i am in Windows:
1. While I am in Windows, the fan almost always runs at the highest setting.
2. The laptop gets significantly hotter than before.
3. The battery charge only lasts an hour - before it would last at least two hours.
4. The power supply gets significantly hotter than before.

Maybe this is just a sign the power supply is going bad, battery is going bad, etc. However, I can't believe that I didn't cause this issue - especially since the problems started immediately after creating the dual-boot/installing Ubuntu.

I have installed the latest versions of ubuntu - hoping that the fan/processor/power issue would magically go away. With the upgrades, the problem has gotten a little better - but I know the problem is not fixed.

The ubuntu forums haven't been much help (they talk about managing the processor - but that works only when using ubuntu as the OS), and asking around with some tech folks i know hasn't panned out.

Any advice? Thanks! (All of you doing this for free is very cool - Thanks again :) )


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  • paul771 May 27, 2009

    Thanks, Chris, for your comments and for your time.

    Please don't think I am being ungrateful, but I am looking for an alternative to reformatting/reloading the drive. I was hoping instead for some kind of advice on how to adjust fan speed from within Windows. OR, perhaps I need to do it from ubuntu, and it works for both partitions somehow. Maybe I should contact HP?

    However, since I am the beggar here, please know that I appreciate your help.

    At this point, i'm game for taking grub and ubuntu off my laptop (i'm fed up with both) - so I just may follow your advice anyway - minus any efforts to run ubuntu going forwards.

    take care

  • paul771 May 29, 2009

    Hello Palmbeach :)

    I appreciate your suggestion! I did, in fact, take my laptop to the repair shop....they cleaned out a LOT of dust from the fan. It did help to drastically reduce the noise....THANK YOU :)

    However, the fan still runs at the same speed - it's just a lot quiter. I do still worry that the power supply/clocking speed/fan isn't being run properly - however, the situation has improved greatly.

    Thanks again (and thanks to Crankstart for the initial solution).


  • Palmbeach
    Palmbeach May 11, 2010

    Hi Paul

    Just wonder if it's worth checking the fans, they get clogged up with dust and severely restrict airflow. The symptoms will be exactly as you have described. Althought the timing in relation to your upgrade may suggest something else is going on. Anyhoo, good luck



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Hi Paul,

Thanks for the pat on the back, it is kinda cool and good exercise for the brain.

I doubt Ubuntu is at fault for the problems, however it is possible that using GRUB has somehow buggered the Power saving ACPI controls. If it has somehow interfered with comunication between windows and the motherboard then the fan is likely running at full tilt as a fail-safe.

The Hot power supply, and battery are likely just due to the load being caused by things running full out. The simplest fix would be to reinstall the factory OS and see if it clears the problem. You can still run Ubuntu on the laptop, but should transfer it to an SD chip or Nomad drive if your model has the optional port. By doing this and using Bios to select which drive to boot from you will avoid running GRUB while running windows which should rectify the problem.

Let me know how this works out for you,


Posted on May 20, 2009

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Hi Paul
I'm glad there was an improvement anyway.
Let's break it down then. There are only going to be two reasons why the fans are working overtime.
1) Your processor IS being overworked and generating enough heat to cause the fan to run.
2) The fan thermostat is faulty.

Now I'm typing this I can't see your full posting, but have you tried booting in safe mode? If so, does the fan reduce speed? When you first boot from stone cold, is the fan quiet for a few minutes of does it start immediately and continue to run?

There are vents on the right hand side of the 5000, both underneath for air intake and on the edge of the case for air out. Make sure you have plently of clearance under the computer. Golden rule is never put an unprotected laptop on your lap! You need at least 2 inches between the air intake vents and the desk surface to allow a good flow of fresh air. Does the right hand side of the case next to the keyboard get very warm? If it does then it does rather suggest that your upgrade may be causing the problem. In normal opertion you can feel heat, but the computer should not feel excessively hot around that area. If it doesn't feel that hot then the thermostat is probably faulty. If it does feel hot, I would suggest you remove your upgrade and recheck your computer.
Sorry, don't know what else to suggest
Best wishes

Posted on May 30, 2009


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