Can't adjust screen brightness (Lenovo Laptop, NVIDIA, XFCE)

Means you do not have the nVidia drivers installed or you don’t have an nVidia card.

Start here:

and if that doesn’t help, open a new topic and provide more information:

https://archived.forum.manjaro.org/t/how-to-provide-good-information-in-your-posts/37102
and post some more information so we can see what’s really going on. Now we know the symptom of the disease, but we need some more probing to know where the origin lies…

An inxi --admin --verbosity=7 --filter --no-host --width would be the minimum required information… (Personally Identifiable Information like serial numbers and MAC addresses will be filtered out by the above command)

:+1: