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The ambient light sensor (ALS) within Intel Sensor Hub device on Intel branded Ultrabook keeps dimming my screen, it does not react to manual screen brightness changes. Is there a way to disable it?

Running Windows 8 RTM.

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Does it show up in Device Manager as a separate device? If it does, you could try disabling it. If it's not separate, what other sensors are there and do you need them? –  Karan Nov 4 '12 at 1:36
    
It's a part of a larger group of sensors called Intel Sensor Hub, disabling the sensor individually is not possible because it shows up as a single device. –  Paulius Uza Nov 4 '12 at 1:47
    
Who is the manufacturer? Sony? Asus? Toshiba? –  corwin01 Nov 4 '12 at 6:00
    
@corwin01 - it's Intel branded ultrabook development kit. –  Paulius Uza Nov 4 '12 at 14:32
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2 Answers

up vote 2 down vote accepted

Go to the Metro Settings. General Tab. Scroll down and you will see automatic brightness. Just turn it off

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Try to put some tape over the sensor?

Have you tried to disable the service?

  1. Run the services panel by typing in Win+R and running services.msc
  2. Find the Sensor Monitoring Service and go to the properties menu by right clicking
  3. In the general tab you should find an option to set the startup type field to disabled
  4. Restart and let us know how it went!
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Thanks. This is a partial solution - while stopping the service Disabling the services.msc manages to restore the screen brightness, but it also kills off other sensors (accelerometer, gyro, etc.) Putting the tape on the sensor is a good solution in case everything else fails. –  Paulius Uza Nov 4 '12 at 14:35
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