[New Found!]

1. When I set to others instead of 1440x900 (16:10) or 1280x800 (16:10) revolutions,

   the black bar must disappear.



2. When I set to 1440x900 revolution, the black bar must exist.

The display area is not fit to my monitor(1440x900) and there is a black bar at the top of my screen. The bottom of the display area can't be displayed. How can I deal with this problem?

I wonder if the problem come from the lack of display card (MSI R4770 Cyclone) driver but I don't know how to install it. Do I need to install it?

Ubuntu Version : 13.10

Here are some related pictures :

My monitor (top)(It is a 19" desktop monitor. [Acer AL1916W]).

My monitor (bottom)

Displays

xrandr

There is no a file named as xorg.conf in X11.

  *-display               

   description: VGA compatible controller

   product: RV740 PRO [Radeon HD 4770]

   vendor: Advanced Micro Devices, Inc. [AMD/ATI]

   physical id: 0

   bus info: pci@0000:01:00.0

   version: 00

   width: 64 bits

   clock: 33MHz

   capabilities: vga_controller bus_master cap_list rom

   configuration: driver=radeon latency=0

   resources: irq:43 memory:d0000000-dfffffff memory:feaf0000-feafffff      ioport:d000(size=256) memory:feac0000-feadffff

   WARNING: output may be incomplete or inaccurate, you should run this program as super-user.

Computer Information

Anyone can help me solve this problem?

Thank you for your attention =]