Video Problem In Ubuntu
 

I am using Ubuntu 9.04 on ATI Radeon HD 2400 Pro Graphics Card.
For getting optimal performance and enable compize-desktop settings yesterday I downloaded and installed latest driver for linux from ATI web page. After Installing driver I activated my driver from Administration-Driver option.
After activation I reboot the system.

But now when I am trying to watch full screen video the system hangs or the screen gets black
and the playback of the video is also not smooth in small screen.

What is the solution?:confused:
Please help me

Have you checked the /var/log/Xorg.0.log to see if there are any errors? They'll be indicated with "EE" in brackets (EE).
cheers,
jdk

I am now giving you the partial log,

X.Org X Server 1.6.0
Release Date: 2009-2-25
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.24-23-server i686 Ubuntu
Current Operating System: Linux murshed-desktop 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009 i686
Build Date: 09 April 2009 02:10:02AM
xorg-server 2:1.6.0-0ubuntu14 (buildd@rothera.buildd)
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Sun Jun 28 02:04:14 2009
(==) Using config file: "/etc/X11/xorg.conf"
(==) ServerLayout "aticonfig Layout"
(**) |-->Screen "aticonfig-Screen[0]-0" (0)
(**) | |-->Monitor "aticonfig-Monitor[0]-0"
(**) | |-->Device "aticonfig-Device[0]-0"
(**) Option "Xinerama" "off"
(==) Automatically adding devices
(==) Automatically enabling devices
(WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
Entry deleted from font path.
(==) FontPath set to:
/usr/share/fonts/X11/misc,
/usr/share/fonts/X11/100dpi/:unscaled,
/usr/share/fonts/X11/75dpi/:unscaled,
/usr/share/fonts/X11/Type1,
/usr/share/fonts/X11/100dpi,
/usr/share/fonts/X11/75dpi,
/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType,
built-ins
(==) ModulePath set to "/usr/lib/xorg/modules"

for your information I find two Xorg.0.log file one is Xorg.0.log and other is Xorg.0.log old

What output device is used by your player? Try to use another one.