crash after freeze in beryl

i have a nvidia 440Go with one screen at 1600x1200 res. Using nvidia drivers 9635.
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 /etc/X11/xorg.conf manual page.
# (Type "man /etc/X11/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 "Files"
 FontPath "/usr/share/X11/fonts/misc"
 FontPath "/usr/share/X11/fonts/cyrillic"
 FontPath "/usr/share/X11/fonts/100dpi/:unscaled"
 FontPath "/usr/share/X11/fonts/75dpi/:unscaled"
 FontPath "/usr/share/X11/fonts/Type1"
 FontPath "/usr/share/X11/fonts/100dpi"
 FontPath "/usr/share/X11/fonts/75dpi"
 FontPath "/usr/share/fonts/X11/misc"
 # path to defoma fonts
 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 "type1"
 Load "vbe"
EndSection

Section "InputDevice"
 Identifier "Generic Keyboard"
 Driver "kbd"
 Option "CoreKeyboard"
 Option "XkbRules" "xorg"
 Option "XkbModel" "pc105"
 Option "XkbLayout" "se"
 Option "XkbOptions" "lv3:ralt_switch"
EndSection

Section "InputDevice"
 Identifier "Configured Mouse"
 Driver "mouse"
 Option "CorePointer"
 Option "Device" "/dev/input/mice"
 Option "Protocol" "ExplorerPS/2"
 Option "ZAxisMapping" "4 5"
 Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"
 Identifier "Synaptics Touchpad"
 Driver "synaptics"
 Option "SendCoreEvents" "true"
 Option "Device" "/dev/psaux"
 Option "Protocol" "auto-dev"
 Option "HorizScrollDelta" "0"
EndSection

Section "InputDevice"
  Driver "wacom"
  Identifier "stylus"
  Option "Device" "/dev/wacom" # Change to
                                                      # /dev/input/event
                                                      # for USB
  Option "Type" "stylus"
  Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
  Driver "wacom"
  Identifier "eraser"
  Option "Device" "/dev/wacom" # Change to
                                                      # /dev/input/event
                                                      # for USB
  Option "Type" "eraser"
  Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"
  Driver "wacom"
  Identifier "cursor"
  Option "Device" "/dev/wacom" # Change to
                                                      # /dev/input/event
                                                      # for USB
  Option "Type" "cursor"
  Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "Device"
 Identifier "NVIDIA Corporation NV17 [GeForce4 440 Go]"
 Driver "nvidia"
 BusID "PCI:1:0:0"
 Option "NvAGP" "1"
 Option "TwinView" "True"
 Option "TwinViewOrientation" "RightOf"
 Option "UseEdidFreqs" "True"
 Option "MetaModes" "1600x1200, 1400x1050"
 Option "UseDisplayDevice" "DFP-0, CRT-0"
 Option "TripleBuffer" "true"
EndSection

Section "Monitor"
 Identifier "Generic Monitor"
 Option "DPMS"
 HorizSync 28-70
 VertRefresh 43-60
EndSection

Section "Screen"
 Identifier "Default Screen"
 Device "NVIDIA Corporation NV17 [GeForce4 440 Go]"
 Monitor "Generic Monitor"
 DefaultDepth 24
 SubSection "Display"
  Depth 1
  Modes "1400x1050"
 EndSubSection
 SubSection "Display"
  Depth 4
  Modes "1400x1050"
 EndSubSection
 SubSection "Display"
  Depth 8
  Modes "1400x1050"
 EndSubSection
 SubSection "Display"
  Depth 15
  Modes "1400x1050"
 EndSubSection
 SubSection "Display"
  Depth 16
  Modes "1400x1050"
 EndSubSection
 SubSection "Display"
  Depth 24
  Modes "1600x1200" "1400x1050"
 EndSubSection
# Enable 32-bit ARGB GLX Visuals
    Option "AddARGBGLXVisuals" "True"

# If you are using an older version of compiz that
# does not support rendering into the Composite
# Overlay Window, you will need to disable clipping
# of GLX rendering to the X Root window with this
# option, or you will get a blank screen after
# starting compiz:
# Option "DisableGLXRootClipping" "True"
EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
 InputDevice "Generic Keyboard"
 InputDevice "Configured Mouse"
 InputDevice "stylus" "SendCoreEvents"
 InputDevice "cursor" "SendCoreEvents"
 InputDevice "eraser" "SendCoreEvents"
 InputDevice "Synaptics Touchpad"
 Option "AIGLX" "true"
EndSection
Section "Extensions"
Option "Composite" "Enable"
EndSection

Section "DRI"
 Mode 0666
EndSection