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I have Win 10 in Dell XPS 17.
On mains power, when I switch on in morning, the screen is always too bright on minimum.
I think my eyes gradually become accustomed, but is there any way to reduce the "minimum" brightness?
I'm comfortable in the registry.
Thanks
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Your laptop should remember the screen brightness setting.
As an example, I am right now typing this response to you on a Lenovo laptop. By default, I run the "Balanced" power configuration with brightness probably somewhere around 80% when plugged in. However, as a test, I just dropped brightness to minimum and then rebooted. After the reboot, the system is still at lowest brightness because it "remembers" this change and makes it the new default for the balanced plan when on AC power.
If this is not working for you, make sure that you are using the Dell provided display drivers and not the generic drivers from Intel, Nvidia, etc. Also, check to see if Dell has any sort of power management settings in their system software that may be overriding the default behavior of Windows that I just described.
I hope that this helps! Let us know if you are still having difficulties with this.
How can you reduce the brightness in the morning? 3 possible options:
1. It might be that this is related to Night Light - if active, screen might be dimmer and less blue at night, then brighter in the morning.
You can turn it off or change settings..
2. Another possibility- your laptop may adapt brightness to ambient conditions:
https://support.microsoft.com/en-us/...b-5858fc007041
Enable or Disable Adaptive Brightness in Windows 10
3. You mention mains power.
You may have a setting in Power Options that dims the display when on battery - so it's brighter when on mains power:
Last edited by dalchina; 25 Oct 2023 at 03:03.
There's an app called: CareUEyes
Version 1.1.0.6 is the free release version. See if you can find a copy of it, and try it out.
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Dell have a support tool called Support Assist. As soon as the tool opens, it automatically checks for latest drivers.
I allowed the tool to download drivers, then restarted. Screen is still bright.
BTW: When I use the Fn brightness key, it opens a slider in an applet at top left. The setting is at zero.
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I used:
Control Panel > Power Options
The default option is "Power Plan". At the foot of the plan, it says Selected Plan > Balanced > Change Plan Settings
The options within refer only to Times for Display, Sleep.
There are no options which would allow selection of a brightness setting.
BTW: My memory is not reliable, but I think that at some time in the past, I may have seen the slider % option to which you refer. But maybe that was simply a static online image
I can live without a plan, but it's annoying that the applet at top left is already at 0%.
Isn't there a registry value that calibrates the relationship between arbitrary percentages and actual hardware configuration ?
Thanks
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Night Light is OFF.
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The option: "Change brightness automatically...." was unchecked.
As an experiment I checked it. But the effects won't be seen until it's dark. If the option WAD, my current bright screen should become even brighter. That might help the troubleshooting.
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I'm permanently on mains power. So, as an experiment, I changed to battery. There was a definite - but almost imperceptible - reduction in brightness.
So that's another experiment that awaits darkness.
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Thanks
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Fantastic !! Thanks.
On minimum, my screen is almost completely black !!
Immediately after downloading, the default was to show exactly my current brightness - which, of course, is too bright.
On the CareUEyes (CUE) slider, that brightness is shown as 90%. I'm assuming that was the TRUE Windows value which caused me to open this current thread. In other words, my Windows slider is out of calibration with the actual values of brightness. It's probably due to something silly that I've done recently. If I knew the registry key for calibration, I could experimnt myself.
Thanks
Added: A neat feature of CUE (apart from the acronym) is that the CUE applet itself responds to changes caused by its own brightness slider. So the user doesn't need to refer to a Windows screen. She can watch the slider and see the effects in her CUE window.
Thanks
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I'll give that a try after I make up for my lost morning's work.
Thanks
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Last edited by OldGrantonian; 25 Oct 2023 at 06:14.
So, I see that I missed a point that others have picked on, namely the fact that you noted that this happens when you switch on the machine in the morning.
Just to 100% clear, can you confirm that you specifically mean that this issue only happens when you power on the machine in the morning? If you were to power off the machine and then back on again in the middle of the day would the same thing happen or do you never power off / back on at any time other than the morning?
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Yes
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No
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I only restart if requested to do so by an app installer, or to clear some app or OS misbehaviour.
BTW: There's no mystery in this glare issue.
If I could reduce the brightness - there would be no glare.
But if I'm not able to reduce the brightness, then glare will be worse in the morning, and will gradually reduce as the outside lighting increases .
Here's the engineer's explanation (probably wrong).
I open my laptop around 5:30 am, but I don't open the window blinds till sunrise at approximately 8:30 am. My office lighting is fairly dim, because I don't want to increase the rate of melting of ice at the poles.
Therefore:
- At 5:30 am, just before I open my laptop, my irises will be almost fully open. Glare from my laptop will therefore be at maximum.
- From 5:30 am until 8:30 am, the outside light intensity gradually increases. Therefore the irises will gradually close to their normal area, so the number of rays impinging on the iris will reduce.
I don't normally use my laptop in the evening, so the reverse process of increasing glare at sundown is not an issue.
Thanks
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