Laptop Brightness dims when charger is unplugged(no solution)?
Solution 1:
I know that this question is 2 years old, but this issue still pertains to this day, and might still be of relevance to some people. I'll be sharing a solution that I found. I'll guess that OP has a laptop with an AMD GPU/iGPU. Basically the graphics driver is causing the screen to dim. To fix this, right click your desktop, then (probably at the top of the menu), click 'AMD Catalyst Control Centre' Then, under 'Power', click 'PowerPlaytm'. Within the new menu that is brought up, look at the bottom where it says 'Enable Vari-Brighttm'. Untick it. Your problem should be solved, as was mine.
Solution 2:
The computer is designed to do that when it's unplugged. You can change the behavior if you don't like it. This link should have everything you need.
http://www.eightforums.com/tutorials/5464-power-plan-settings-change-windows-8-a.html
Solution 3:
If you own a computer with amd graphics. You will have to disable "vari-bright"
1)go to amd radeon settings 2) go to advanced 3) energy/battery-> disable vari-bright
Solution 4:
It's a very late answer but it could possibly help someone...
This is one of the complex problems which has irritated me for very long and I can guarantee that one who has not experienced the problem cannot understand it fully.
I first found this problem on my laptop (Dell 3543). The problem is when you start your laptop unplugged, the screen is very low in contrast and in addition to that the brightness changes dynamically based on the content it displays.
Some people call it Intel Display Power Saving Technology's Fault many confuse it with adaptive brightness but the real problem is related with the BIOS.
Few Working Solutions:-
- Uninstall Display Driver
- Update your BIOS
In my case however I re-installed an older bios from vendor.