Hi, 

Please view this article and follow the steps, it may be the cause of the issue.  

Tried that, no luck. 

I've just installed the latest Intel graphics chip driver and it seems to have done the trick! If i don't post back we can safely assume the driver was the solution. For reference it was a driver released early March.

Cheers,

Ben.

Hi, 

Thank you for confirming this. 

Turns out it hasn't quite done the job... 

Still getting some MAJOR screen dimming. Really disappointing. Does anyone have any.... bright ideas?

I've been in touch with Alienware and they have suggested the following as a fix, which so far seems to have worked!

Thank you for your call today.

As agreed im sending you this email with a link to our drivers page where you can download the on screen display application that could help you.

http://www.dell.com/support/home/uk/en/ukdhs1/product-support/servicetag/9GQ0M72/drivers

Before you try to install the application try this steps:

1. Right click on your battery and go to power options

2. In power options where you have it set on balanced click on the: change plan settings

3. Click on Change advanced power settings next and it will open another window with power options

4. Scroll down until you find the display and in the options there should be an option Enable adaptive Brightness - turn it off

The Adaptive Brightness is a feature of the system. If you don't want use it you can turn it off

You can reply to this email with any results of the test. Thank you

Have you looked at the Power Options section? In it three is a selection for "Enable Adaptive Brightness". You can turn this on or off.

The other option is on bottom left Action Center. There is a panel with a "Sun" It will show 0, 25, 50, 75, or 100 percent. You can manuall set the adaptive brightness back to any of these values.