![]() ![]() I rather assume this is something I'll need to report to Dell to have them fix, but I wanted to see if there was any knowledge or expertise here regarding something I may have overlooked or been unaware of that could solve this. I've assumed it was a driver issue, and so I've downloaded the latest drivers from Dell, and also from Intel (integrated graphics), as well as updated the system BIOS. The issue switches between this fully-dim/fully-bright duality and normal graduated brightness levels usually during a power state event, such as sleeping, screen closed (off) but system still on (docked/connected to power), or restarting. The brightness option in the Intel HD Graphics Control Panel does work. The brightness option in the Windows Mobility options is shown/the slider moves, but has no effect. Typically, restarting the computer resolves the issue for a period of time, but not every time. This week the Fn + up/down brightness control has stopped working (it does not popup at all). However, there are only two brightness levels effectively applied: When the indicator is all the way down the screen is as dim as it can go, and when the indicator is in any other position, beginning just one point above fully down and extending all the way to the top of its path, the screen runs at full brightness. ![]() The system is still remembering the brightness level selected, because as I leave the system for a while with the brightness indicated at, for instance, 50%, when I begin pressing the F5 (to reduce brightness) or F6 (to increase brightness) the indicator begins at 50% where I'd left it previously. Using the F5 and F6 keys to brighten and dim the screen, I see the indicator showing brightness going up or down, appropriate to the key I'm pressing, but the screen is fully bright in every position along that indicator other than all the way down at the bottom, when the screen immediately goes to fully dimmed. The issue is only with the integrated display on the laptop.įrom time to time, ranging from a few times each day to once or twice a week, the laptop screen will only allow either fully bright or fully dim in its brightness settings. This is a Dell Latitude 7400 2-in-1, running Windows 10 20H2, fully patched. If you can’t find the Brightness option, select the Menu button to reveal brightness controls. I have only used laptops of the same model myself and so will focus on this. Press on the button associated with the Brightness/Contrast option. ![]() This issue has happened on multiple computers. I am an IT professional responsible for keeping this laptop running, along with several hundred of its siblings and ancestors. Created on OctoHow do I dim the screen brightness further than the lowest setting Im often on my computer at night and prefer to work in the dark. While there, check that the brightness isnt automatically adjusted by your PC or laptop. Full disclosure: This is a company-owned laptop. Go to Control Panel > System and Security > Power Options and check that your power options arent affecting the brightness on your screen. ![]()
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