If you don't see required resolution
xrandr
#add new mode
xrandr --addmode VGA-1 "1920x1080"
#activate mode via xrandr
xrandr --output VGA-1 --mode "1920x1080"
Source: http://www.martinaulbach.net/linux/command-line-magic/59-setting-higher-screen-resolution-for-external-monitor-in-ubuntu-14-10
