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    hp 8540p brigtness control problem...

    Discussion in 'HP Business Class Notebooks' started by ivanox1972, Oct 21, 2011.

  1. ivanox1972

    ivanox1972 Notebook Consultant

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    I have replaced screen AUO B156HW01 V4 with V7.
    All is OK, picture is phenomenal, but I have 1 problem.
    Can not control brightness with FN+ keyboard keys, as usual which worked before.
    I have update Nvidia driver, also reinstalled hp optimized power profile, but no luck.
    Also in power profiles brightness control dissapeared totally, all other options are there.
    Any suggest?
     
    ivanox1972, Oct 21, 2011
    #1
  2. Siorah

    Siorah Beware of Squirrels!

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    The system probably can't see the new screen. The brightness control is given by the screen to the computer, if it's not one it recognises, this could be the problem.

    However i have no idea how to fix this one! just know the problem exists.
     
    Siorah, Oct 21, 2011
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  3. ivanox1972

    ivanox1972 Notebook Consultant

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    Yes I need driver for AUO17ED...
    Do you have it?
     
    ivanox1972, Oct 21, 2011
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  4. Siorah

    Siorah Beware of Squirrels!

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    sadly no, one question though, did you reinstall your quick launch button driver after installing the new screen?
     
    Siorah, Oct 21, 2011
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  5. ivanox1972

    ivanox1972 Notebook Consultant

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    Yes, I have tried also this- no change...
    It seems I definitely need monitor driver...
    It is strange that I can not find it on internet- do some body knows where it is used?
     
    ivanox1972, Oct 23, 2011
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  6. ivanox1972

    ivanox1972 Notebook Consultant

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    No solution still...
    I have reinstalled windows, new driver nvidia, new qbuttons, still same- no brightness changing... It is definitely some driver problem because in Ubuntu it is possible to change by FN+ f9 f10, although it also not exists in Ubuntu power options...
     
    ivanox1972, Oct 30, 2011
    #6
  7. ivanox1972

    ivanox1972 Notebook Consultant

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    Ambient sensor working perfectly...
    Any idea?
     
    ivanox1972, Nov 2, 2011
    #7
  8. Siorah

    Siorah Beware of Squirrels!

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    can you try to do one last thing before i will give up on this totally.

    Can you uninstall quick launch buttons and follow the CHIPSET part of this tutorial? (STEPS 14-16 ARE OPTIONAL)

    GFX Fixes Thread

    make sure you use the driver for your notebook.

    reboot before installing quick launch as well.

    Let me know

    Siorah
     
    Siorah, Nov 2, 2011
    #8
  9. ivanox1972

    ivanox1972 Notebook Consultant

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    Is this chipset driver
    Intel® Rapid Storage Technology driver or something else?
     
    ivanox1972, Nov 3, 2011
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  10. Siorah

    Siorah Beware of Squirrels!

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    le sigh

    windows 7 version: Windows Chipset Driver

    You will need to accept and it will give you the download.

    Then follow the tutorial
     
    Siorah, Nov 4, 2011
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  11. ivanox1972

    ivanox1972 Notebook Consultant

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    I have tried your procedure- but no success...
    No further ideas...
    Thanks for help
     
    ivanox1972, Nov 16, 2011
    #11
  12. ivanox1972

    ivanox1972 Notebook Consultant

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    I was so desprate to install xp and brightness control works...win 7 only makes problem...
     
    ivanox1972, Dec 16, 2011
    #12