Comment 7 for bug 1382032

I have found a workaround to solve the problem which is propably caused by a bug in Gnome-3.

Quote from: http://www.redips.net/linux/gnome-wrong-window-scaling-tv/

Qoute {

Here is command to execute in terminal as ordinary user (not root):

gsettings set org.gnome.desktop.interface scaling-factor 1
This command should immediately set some display elements to correct scaling, but to apply change for whole desktop you will have to logout and login. Set key can be read back with “get” option:

gsettings get org.gnome.desktop.interface scaling-factor

}

A detailed bug description can be found here: https://bugzilla.gnome.org/show_bug.cgi?id=708382