When I press the decrease brightness hotkey (F2) the brightness increases in steps of 5% till it reaches 100% but the screen backlight is the dimmest here, and unusable.
When I press the increase brightness hotkey (F3) the brightness decreases in steps of 5% till it reaches 0%, this would usually be the 20% brightness state in Windows.Brightness control keys work, however their behaviour is inverted.The default brightness is set too low, barely visible.This is very weird, and in all my Linux installs so far, I haven’t come across such behaviour. I don’t think I mucked up anything in the install afaik, but I thought it’d be safe to install Manjaro instead and booted up the Live ISO only to be greeted by the same bug. Turns out the brightness levels were much too low and barely usable in daytime. I wanted to try out Linux on my newly purchased HP Victus 15, so I nuked the Windows 11 it came with and installed Windows 10 LTSC and started out by installing Arch + KDE. Press and hold (or right-click) the display adapter name, then select Update driver and follow the instructions.Display Brightness Inversion on Vanilla Install of Manjaro on HP Victus 15 In Device Manager, select Display adapters, then select the display adapter. In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results. If you don't have a desktop PC and the slider doesn't appear or work, try updating the display driver. To find the brightness slider in earlier versions of Windows 10, select Settings > System > Display, and then move the Change brightness slider to adjust the brightness. The Brightness slider appears in action center in Windows 10, version 1903. To change the brightness on an external monitor, use the buttons on it. You might not see the Change brightness for the built-in display slider on desktop PCs that have an external monitor. Even if you use it, you can still move the Change brightness for the built-in display slider to fine-tune the brightness level.
This automatic setting helps make sure your screen is readable wherever you go. Under Brightness and color, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. To find out if your PC supports this, select Settings > System > Display. Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. (If the slider isn't there, see the Notes section below.) Select action center on the right side of the taskbar, and then move the Brightness slider to adjust the brightness. For more info, see Adaptive brightness and contrast in Windows.
Some Windows PCs can automatically adjust the screen brightness and contrast based on content that’s displayed on your built-in screen. You might also see another check box displayed: Help improve battery by optimizing the content shown and brightness. Even if you use it, you can still move the Brightness slider to fine-tune the brightness level for a built-in display. Select Brightness, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. To find out if your PC supports this, select Settings > System > Display. (If the slider isn't there, see the Notes section below.) Select the Network icon on the right side of the taskbar, and then move the Brightness slider to adjust the brightness.