XGL raising gamma/lowering depth

[MrDuck]

Hi,
whenever i start xgl session, my desktop becomes VERY light, like gamma went up by 100%. Also, color depth looks like maybe 8 bit at most. Without XGL it's everything ok.
Any suggestions?
Here's my xorg.conf:

$ cat /etc/X11/xorg.conf

# /etc/X11/xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf(5) manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#  sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerLayout"
    Identifier   "Default Layout"
    Screen     "Default Screen" 0 0
    InputDevice  "Generic Keyboard"
    InputDevice  "Configured Mouse"
EndSection

Section "Files"
    # path to defoma fonts
    FontPath   "/usr/share/fonts/X11/misc"
    FontPath   "/usr/share/fonts/X11/cyrillic"
    FontPath   "/usr/share/fonts/X11/100dpi/:unscaled"
    FontPath   "/usr/share/fonts/X11/75dpi/:unscaled"
    FontPath   "/usr/share/fonts/X11/Type1"
    FontPath   "/usr/share/fonts/X11/100dpi"
    FontPath   "/usr/share/fonts/X11/75dpi"
    FontPath   "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
    Load "i2c"
    Load "bitmap"
    Load "ddc"
    Load "dri"
    Load "extmod"
    Load "freetype"
    Load "glx"
    Load "int10"
    Load "vbe"
EndSection

Section "ServerFlags"
    Option   "AIGLX" "off"
EndSection

Section "InputDevice"
    Identifier "Generic Keyboard"
    Driver   "kbd"
    Option   "CoreKeyboard"
    Option   "XkbRules" "xorg"
    Option   "XkbModel" "pc105"
    Option   "XkbLayout" "cz"
EndSection

Section "InputDevice"
    Identifier "Configured Mouse"
    Driver   "mouse"
    Option   "CorePointer"
    Option   "Device" "/dev/input/mice"
    Option   "Protocol" "ImPS/2"
    Option   "ZAxisMapping" "4 5"
    Option   "Emulate3Buttons" "false"
    Option   "Buttons" "7"
    Option   "ButtonMapping" "1 2 3 6 7"
EndSection

Section "Monitor"
    Identifier  "BenQ FP92E"
    Option   "DPMS"
EndSection

Section "Device"
    Identifier "X1600"
    Driver   "fglrx"
    Option   "Capabilities" "0x00000800"
    Option   "UseFastTLS" "off"
    Option   "KernelModuleParm" "locked-userpages=0"
    Option   "VideoOverlay" "off"
    Option   "OpenGLOverlay" "on"
    Option   "OverlayOnCRTC2" "1"
    Option   "FSAAScale" "0"
    Option   "FSAAEnable" "off"
    BusID    "PCI:1:0:0"
EndSection

Section "Screen"
    Identifier "Default Screen"
    Device   "X1600"
    Monitor  "BenQ FP92E"
    DefaultDepth   24
    SubSection "Display"
        Depth   1
        Modes  "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
    EndSubSection
    SubSection "Display"
        Depth   4
        Modes  "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
    EndSubSection
    SubSection "Display"
        Depth   8
        Modes  "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
    EndSubSection
    SubSection "Display"
        Depth   15
        Modes  "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
    EndSubSection
    SubSection "Display"
        Depth   16
        Modes  "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
    EndSubSection
    SubSection "Display"
        Depth   24
        Modes  "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "720x400" "640x480" "640x350"
    EndSubSection
EndSection

Section "DRI"
    Mode     0666
EndSection

Section "Extensions"
    Option   "Composite" "Enable"
EndSection