ATi x1300奇怪的驱动问题

our1944

我的电脑是dell inspiron 6400, intel T2050, 1G ddr2, ATi x1300(64m)
FC6 kernel 2.6.18
我参考各大论坛用yum 装好了kmod-fglrx 和 xorg-x11-drv-fglrx

[root@localhost sebastian]# fglrxinfo
display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Mobility Radeon X1300 Generic
OpenGL version string: 2.0.6174 (8.31.5)


但是
[root@localhost sebastian]# fgl_glxgears
Using GLX_SGIX_pbuffer
800 frames in 5.0 seconds = 160.000 FPS
931 frames in 5.0 seconds = 186.200 FPS
943 frames in 5.0 seconds = 188.600 FPS
928 frames in 5.0 seconds = 185.600 FPS
941 frames in 5.0 seconds = 188.200 FPS

我的xorg.conf
# Xorg configuration created by system-config-display

Section "ServerLayout"
        Identifier     "single head configuration"
        Screen      0  "Screen0" 0 0
        InputDevice    "Keyboard0" "CoreKeyboard"
        InputDevice    "Synaptics" "CorePointer"
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "kbd"
        Option            "XkbModel" "pc105"
        Option            "XkbLayout" "us"
EndSection

Section "InputDevice"
        Identifier  "Synaptics"
        Driver      "synaptics"
        Option            "Device" "/dev/input/mice"
        Option            "Protocol" "auto-dev"
        Option            "Emulate3Buttons" "yes"
EndSection

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
        Identifier   "Monitor0"
        ModelName    "LCD Panel 1280x800"
### Comment all HorizSync and VertSync values to use DDC:
        HorizSync    31.5 - 90.0
        VertRefresh  59.9 - 60.1
        Option            "dpms"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "fglrx"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1280x800" "1152x864" "1024x768" "800x600" "640x480"
        EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection
Section "Extensions"
         Option "Composite" "Disable"
EndSection

用fedora core有一段时间了，但是从来没有解决这个问题。。。郁闷！
希望大家能帮忙，感谢！