Desktop does not fill available area

[deric]

I have a LG screen IPS231, when I maximize a window, part of the windows goes behind the edge of screen. And all the letters are a bit blurred
xrandr:
VGA1 connected 1920x1080+1680+0 (normal left inverted right x axis y axis) 510mm x 290mm
1920x1080 60.0*+
1680x1050 60.0
1280x1024 75.0 60.0
1152x864 75.0
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1

I have this screen as secondary, the native resolution should be 1920x1080
here is my `lspci -v`: http://pastebin.ubuntu.com/859060/
When I disabled the primary screen the resolution was still the same

Is it a problem of my graphic card?

[Teunis]

My first question is why do you use xrandr, can't you set up the second screen through the System Settings?

[SecretCode]

Are there any proprietary drivers available for your Intel graphics card? (Not sure, I have only worked with NVIDIA cards.)

[Teunis]

I have two Intel based computers and I did not need to install anything extra for the video to work.
But there is a website for Intel graphic drivers:
http://intellinuxgraphics.org

They write "In general, Intel graphics driver is well integrated in Linux distributions so users won't have to worry about the driver setup.
They do offer some bleeding edge stuff:
http://intellinuxgraphics.org/install.html