Настройка ati-drivers

Возможно ли как-то настроить-донастроить проприетарный драйвер ati ?
Видео ATI Mobility Radeon HD 4500 Series (Lenovo G555).
Проблема собственно вот в чём:
MKV ролики (фильмы) проигрываются с еле заметным подтормаживанием и наложением кадра на кадр (gnome-mplayer).
Как эту проблему победить ? Эти же MKV фалы в Винде просто "летают" (kmplayer, windows media player)(Винда установлена второй ОС).
...
calculate slava # glxinfo
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: ATI
server glx version string: 1.4
...
Конфиг:
calculate slava # cat /etc/X11/xorg.conf

#------------------------------------------------------------------------------
# Modified Calculate-install 2.2.5
# Processed template files:
# /usr/share/calculate/templates/install/1merge/xorg-server/X11/xorg.conf
# For modify this file, create /etc/X11/xorg.conf.clt template.
#------------------------------------------------------------------------------

Section "ServerLayout"
Identifier "Xorg Configured"
Screen 0 "aticonfig-Screen[0]-0" 0 0
EndSection

Section "Files"
FontPath "/usr/share/fonts/corefonts"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/droid"
EndSection

Section "Module"
Load "dri"
Load "dbe" # Double buffer extension
Load "glx" # OpenGL X protocol interface
Load "extmod" # Misc. required extension
EndSection

Section "Monitor"
Identifier "StandardMonitor"
Option "DPMS"
EndSection

Section "Monitor"
Identifier "aticonfig-Monitor[0]-0"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection

Section "Device"
Identifier "radeonVGA"
Driver "radeon"
EndSection

Section "Device"
Identifier "aticonfig-Device[0]-0"
Driver "fglrx"
Option "VideoOverlay" "on"
Option "OpenGLOverlay" "off"
Option "XAANoOffscreenPixmaps" "on"
# Option "TexturedXrender" "on"
# Option "TexturedVideo" "off"
# Option "Textured2D" "off"
BusID "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "Monitor"
Device "radeonVGA"
Monitor "StandardMonitor"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1366x768"
EndSubSection
EndSection

Section "Screen"
Identifier "aticonfig-Screen[0]-0"
Device "aticonfig-Device[0]-0"
Monitor "aticonfig-Monitor[0]-0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

Section "DRI"
Group "video"
Mode 0666
EndSection

Section "Extensions"
Option "Composite" "On"
EndSection

calculate slava #

Заранее спасибо.