Hello,

I have an issue with HDMI output to external monitor (HDMI to DVI) on my IdeaPad Z50-70 (Intel HD Graphics 4400 / GeForce 840M).

The problem appears only in games and only on external monitor (not on notebook display). The image output i too dark, especially shadows, dark rooms etc. And some games are nearly not playable. Maybe it's more gamma correction problem than brightness.

The problem appears even if I disable GeForce and use only Intel HD Graphics. I'm using Windows 8.1 64-bit, latest Intel and nVidia drivers.

I've tried to find some gamma/brigtness settings for HDMI in nVidia and HD graphics controll panel, but haven't found anything. I'll be glad for every advice.

It is a game problem then.

Which games are you playing?

Have you tried in-game gamma correction?

Are you playing in a dark room?

Is your TV set to Eco settings or something? (that dims the display depending on ambient light)