My screen brightness is stuck at maximum..

My screen brightness has refused to increase or decrease. Somebody pls help what do i do?
I use Windows 7 Ultimate 64-bit Service Pack 1,  hp pavilion dm4 2191us
ive tried installing the drivers Intel graphics and all but its still not working

Hi @Jeanred ,
Thank you for your query, I am happy to help!
I grasp that you are running Windows 7 SP 1 and you are unable to adjust the brightness on your display.
Has there been any recent changes to your system?
Here is a link to Troubleshooting display brightness (Windows 8, Windows 7 and Windows Vista) to help you overcome this difficulty.
I hope this helps.
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

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    [2009-09-01 11:25] >>> Updating module dependencies. Please wait ...
    [2009-09-01 11:25] upgraded kernel26-my (2.6.28-1 -> 2.6.28-1)
    [2009-09-01 11:26] >>> Updating module dependencies. Please wait ...
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    [2009-09-01 11:29] upgraded kernel26-my (2.6.28-1 -> 2.6.28-1)
    [2009-09-01 11:30] >>> Updating module dependencies. Please wait ...
    [2009-09-01 11:30] upgraded kernel26-my (2.6.28-1 -> 2.6.28-1)
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    [2009-09-01 11:34] >>> Updating module dependencies. Please wait ...
    [2009-09-01 11:34] installed kernel26-my (2.6.28-1)
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    [2009-09-01 11:38] upgraded kernel26-my (2.6.28-1 -> 2.6.28-1)
    [2009-09-01 11:40] >>> Updating module dependencies. Please wait ...
    [2009-09-01 11:40] upgraded kernel26-my (2.6.28-1 -> 2.6.28-1)
    [2009-09-01 11:40] >>> Updating module dependencies. Please wait ...
    [2009-09-01 11:40] upgraded kernel26-my (2.6.28-1 -> 2.6.28-1)
    [2009-09-01 11:42] >>> Updating module dependencies. Please wait ...
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    [2009-09-03 19:35] starting full system upgrade
    [2009-09-04 09:08] synchronizing package lists
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    [2009-09-04 12:27] starting full system upgrade
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    [2009-09-06 12:47] synchronizing package lists
    [2009-09-06 12:48] starting full system upgrade
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    [2009-09-06 17:54] starting full system upgrade
    [2009-09-07 12:06] synchronizing package lists
    [2009-09-07 12:07] starting full system upgrade
    [2009-09-07 12:07] synchronizing package lists
    [2009-09-07 12:07] starting full system upgrade
    [2009-09-07 12:07] upgraded alsa-lib (1.0.20-1 -> 1.0.21-1)
    [2009-09-07 12:07] upgraded alsa-utils (1.0.20-2 -> 1.0.21-1)
    [2009-09-07 12:07] upgraded hdparm (9.21-1 -> 9.26-1)
    [2009-09-07 12:07] upgraded usbutils (0.84-1 -> 0.86-2)
    [2009-09-07 13:15] installed gedit-plugins (2.26.2-1)
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    [2009-09-07 17:44] starting full system upgrade
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    [2009-09-07 17:44] upgraded gnupg2 (2.0.12-1 -> 2.0.13-1)
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    [2009-09-08 10:19] starting full system upgrade
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    [2009-09-08 10:22] upgraded fuse (2.7.4-3 -> 2.8.0-1)
    [2009-09-08 10:22] upgraded gparted (0.4.6-1 -> 0.4.6-2)
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