Everything is working but the brightness....help

[flash0151]

Hello I've succeffully installed High Sierra on my Dell inspiron 15 3878 there is just one problem got everything is working but the brightness is very dimmed. I tried the various kext to no avail. Can anyone point me in the right direction please.

 

[Korreckj328]

This guide is pretty comprehensive on what you need to do. If you follow it it should give you working backlight control, though I haven't yet bothered to actually map my brightness keys yet. https://www.tonymacx86.com/threads/...rol-using-applebacklightinjector-kext.218222/