When I bought my DELL 3521 some weeks ago, which came with OS Ubuntu, I remember the screen brightness was adjustable by using Fn keys ( F4 / F5).
Since I installed Win7 some days back the screen brightness remain very dull ( may be the lowest setting), which I do not mind for my day to day work. But for my photo and graphic work this intensity is far from satisfactory.
I have checked the internet on this and saw many of you also share the same experience. I followed almost all the advices given in there and since there was no improvement, I downloaded all the drivers from the DELL official website for Win7 and installed them. Actually then one thing happened, that is now I could see the on-screen brightness and loudness control icons or symbols. Incindentally the sound (speaker) control works fine (Fn/F10/F11/F12), while the screen brightness indication appears without any response to the keys ( actually it indicates the maximum brightness in the scale and when I try to reduce the scale it reduces by scale/point and stays and would not move any further). However, this has no change in the brightness of the screen, which as I already told, is low.
I have not yet decided to contact the dealer on this matter which could be a small issue perhaps, which I am uanble to come to terms with yet.
I do not know how to solve this problem. Is this a technical issue or a manufacturing fault? Could anyone help me please. Must be very grateful.
Regards
Gehan Wijesinghe / Sri Lanka