Тормоза при изменении размеров и перемещении окон в KDE

При изменении размеров окна или перемещении окна в top'е показывается, что %CPU=60-90. При этом amarok начинает заикаться. С чем это может быть связано?

kdelibs-3.5.8-r3, kdebase-startkde-3.5.8-r1,xorg-x11-7.3

[ebuild R ] x11-base/xorg-server-1.4.0.90-r3 USE="dri hal ipv6 sdl xorg -3dfx -debug -dmx -kdrive -minimal (-nptl) -xprint" INPUT_DEVICES="keyboard mouse -acecad -aiptek -calcomp -citron -digitaledge -dmc -dynapro -elo2300 -elographics -evdev -fpit -hyperpen -jamstudio -joystick -magellan -microtouch -mutouch -palmax -penmount -spaceorb -summa -synaptics -tek4957 -ur98 -vmmouse -void -wacom" VIDEO_CARDS="fbdev radeon vesa -amd -apm -ark -chips -cirrus -cyrix -dummy -epson -fglrx -glint -i128 -i740 -i810 (-impact) -imstt -mach64 -mga -neomagic (-newport) -nsc -nv -nvidia -r128 -rendition -s3 -s3virge -savage -siliconmotion -sis -sisusb (-sunbw2) (-suncg14) (-suncg3) (-suncg6) (-sunffb) (-sunleo) (-suntcx) -tdfx -tga -trident -tseng -v4l -vermilion -vga -via -vmware -voodoo -xgi" 0 kB

xorg.conf

Section "ServerLayout"
        Identifier     "X.org Configured"
        Screen      0  "Screen0" 0 0
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
        FontPath     "/usr/share/fonts/misc/"
        FontPath     "/usr/share/fonts/Type1/"
        FontPath     "/usr/share/fonts/100dpi/"
        FontPath     "/usr/share/fonts/75dpi/"
EndSection

Section "Module"
        Load  "extmod"
        SubSection "extmod"
                Option  "omit xfree86-dga"
        EndSubSection
        Load  "dbe"
        Load  "record"
        Load  "xtrap"
        Load  "dri"
        Load  "drm"
        Load  "glx"
        Load  "freetype"
        Load  "type1"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option      "XkbRules" "xorg"
        Option      "XkbLayout" "us,ru(winkeys)"
        Option      "XkbOptions" "grp:ctrl_shift_toggle, grp_led:scroll"
EndSection

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "auto"
        Option      "Device" "/dev/input/mice"
        Option      "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
        Option       "DPMS" "true"
        HorizSync 30.0 - 85.0
        VertRefresh 50.0 - 160.0
EndSection

Section "Device"

        Identifier  "Card0"
        Driver      "radeon"
        VendorName  "ATI Technologies Inc"
        BoardName   "RV350 AP [Radeon 9600]"
        Option      "AGPMode" "8"
        Option      "EnablePageFlip" "True"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth 24

        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes   "1024x768"
        EndSubSection
EndSection

Section "dri"
        Mode 0666
EndSection