![]() the brightness indicator did go down to the lowest level, YET brightness remained unaltered in fact. I then disconnected my laptop from main power, and. In particular, you need to add X-related device option settings EnableBrightnessControl1 as per Brightness not working after installing NVIDIA driver. How to fix Windows auto-brightness problems To launch the Intel Graphics Command Center app in Windows 10, just click the Start button and type Intel, which should bring up Graphics Command. * There is more: on power management, I chose the lowest possible level of brightness when working on battery, just to see what would happen. The indicator gets stuck approximately in the middle of the bar, unable to reach the extremes. For example, I am having some problem that my HDMI port no longer sends signal to my second. Dell Inspiron 1520 screen brightness adjustment not working. Try to adjust the brightness on Windows Setting again. After reboot, you should only see one entry under Monitors. * As I try to adjust it using the fn key (as I had always done previously), brightness goes up or down just one level - and that just 'cosmetically', as in fact nothing changes. Buy Dell Inspiron N4050 RTC CMOS Battery online today. Please follow the below steps: Open the Device Manager on your computer. ![]() Unlike the vast majority of users who had this problem, this hasn't happened following an update to windows 8.1 (which I did several months ago - and the adjust was working fine after that). I have read half a dozen threads reporting the same problem I tried all the solutions therein (from updating the driver and reverting to the most basic one to manually changing power configurations) and nothing worked. I've noticed, today, that I'm suddenly unable to adjust my screen brightness.
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