Need to install the driver of AMD A6-4400M APU with Radeon(tm) HD Graphics

Normally there should be no need for installing extra drivers, because they should already be present on your system.

For diagnostic purposes please provide the output that you get for the following commands (to be executed in a terminal window):

uname -a
lsb_release -crid
sudo lshw -C display
xrandr -q

Hey I have ran the commands and now I am sending the attachment to you.

abhishek@abhishek-ProBook:~$ uname -a
Linux abhishek-ProBook 4.10.0-37-generic #41~16.04.1-Ubuntu SMP Fri Oct 6 22:42:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
abhishek@abhishek-ProBook:~$ lsb_release -crid
Distributor ID: Ubuntu
Description: Ubuntu 16.04.3 LTS
Release: 16.04
Codename: xenial
abhishek@abhishek-ProBook:~$ sudo lshw -C display
[sudo] password for abhishek:
  *-display
       description: VGA compatible controller
       product: Trinity [Radeon HD 7520G]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 1
       bus info: pci@0000:00:01.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:34 memory:c0000000-cfffffff ioport:5000(size=256) memory:d6000000-d603ffff memory:c0000-dffff
abhishek@abhishek-ProBook:~$ xrandr -q
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384
LVDS connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
   1366x768 59.99*+ 40.00
   1280x720 59.97
   1152x768 59.95
   1024x768 59.95
   800x600 59.96
   848x480 59.94
   720x480 59.94
   640x480 59.94
VGA-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
abhishek@abhishek-ProBook:~$ ^C
abhishek@abhishek-ProBook:~$

You have the dedicated radeon driver installed.
Is there anything wrong with your display, or why do you think that you need another one?

When I play video on VLC the video lags a lot and get hangs up also.
Plus after closing 1 or 2 softwares the screen get some kind of disturbances like unstable. Since I don't have the screen shot otherwise I would have shown you.
These are few reason why I want to install the drivers.

Is there any way to install the graphics driver or not if yes please provide the solution.
videos are lagging plus having problem in display.

For further diagnostics, what is the output of the commands

dmesg | egrep 'drm|radeon'
LIBGL_DEBUG=verbose glxinfo

(if the last commands fails with command not found, install the related package with
sudo apt-get install mesa-utils
and repeat the command)

(source: https://help.ubuntu.com/community/RadeonDriver )

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