mouse cursor disappear

My mouse cursor disappears when I use for instance konsole or kaffeine.
Unfortunately, it does not reappear, I have to guess position of cursor but I can still click.

This is true only when I use nvidia driver, not with nv.
I was using compiz I removed -> no improvement.
I tried several version of nvidia drivers, legacy and proprietary, no improvement.

I was using feisty without any problems with following configuration :
2 x video cards nvidia 7600GS in SLI
After upgrade to gutsy, I had several problems I solved except this one.

I am still confused, is it a X or a driver problem (I did not see anything abnormal in xorg log) ?

Here is my xorg.conf :

Section "ServerLayout"
    Identifier "Default Layout"
    Screen 0 "screen1" 0 0
    InputDevice "Generic Keyboard"
    InputDevice "Configured Mouse"
# InputDevice "stylus" "SendCoreEvents"
# InputDevice "cursor" "SendCoreEvents"
# InputDevice "eraser" "SendCoreEvents"
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 "extmod"
    Load "freetype"
    Load "int10"
    Load "vbe"
    Load "glx"
    Load "v4l"
EndSection

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

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

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

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

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

Section "Monitor"
    Identifier "Generic Monitor"
    HorizSync 28.0 - 51.0
    VertRefresh 43.0 - 60.0
    Option "DPMS"
EndSection

Section "Monitor"
    Identifier "monitor1"
    VendorName "Generic"
    ModelName "Flat Panel 1920x1200"
    HorizSync 31.5 - 90.0
    VertRefresh 60.0
    Gamma 1
    ModeLine "800x600@60" 40.0 800 840 968 1056 600 601 605 628 +hsync +vsync
    ModeLine "1280x768@60" 80.1 1280 1344 1480 1680 768 769 772 795 -hsync +vsync
    ModeLine "1280x720@60" 74.5 1280 1336 1472 1664 720 721 724 746 -hsync +vsync
    ModeLine "1280x800@60" 83.5 1280 1344 1480 1680 800 801 804 828 -hsync +vsync
    ModeLine "1440x900@60" 106.5 1440 1520 1672 1904 900 901 904 932 -hsync +vsync
    ModeLine "1600x1024@60" 136.4 1600 1704 1872 2144 1024 1025 1028 1060 -hsync +vsync
    ModeLine "1680x1050@60" 147.1 1680 1784 1968 2256 1050 1051 1054 1087 -hsync +vsync
    ModeLine "1920x1200@60" 193.2 1920 2048 2256 2592 1200 1201 1204 1242 -hsync +vsync
EndSection

Section "Monitor"

  #
    Identifier "monitor2"
    VendorName "Plug 'n' Play"
    ModelName "Plug 'n' Play"
    Gamma 1
    ModeLine "640x480@60" 25.2 640 656 752 800 480 490 492 525 -hsync -vsync
    ModeLine "800x600@60" 40.0 800 840 968 1056 600 601 605 628 +hsync +vsync
    ModeLine "1280x768@60" 80.1 1280 1344 1480 1680 768 769 772 795 -hsync +vsync
    ModeLine "1280x720@60" 74.5 1280 1336 1472 1664 720 721 724 746 -hsync +vsync
    ModeLine "1280x800@60" 83.5 1280 1344 1480 1680 800 801 804 828 -hsync +vsync
    ModeLine "1440x900@60" 106.5 1440 1520 1672 1904 900 901 904 932 -hsync +vsync
    ModeLine "1600x1024@60" 136.4 1600 1704 1872 2144 1024 1025 1028 1060 -hsync +vsync
    ModeLine "1680x1050@60" 147.1 1680 1784 1968 2256 1050 1051 1054 1087 -hsync +vsync
    ModeLine "1920x1200@60" 193.2 1920 2048 2256 2592 1200 1201 1204 1242 -hsync +vsync
EndSection

Section "Monitor"

  #
    Identifier "monitor3"
    Gamma 1
EndSection

Section "Monitor"

 #
    Identifier "monitor4"
    Gamma 1
EndSection

Section "Monitor"

 #
    Identifier "monitor5"
    Gamma 1
EndSection

Section "Device"
    Identifier "Generic Video Card"
    Driver "nvidia"
EndSection

Section "Device"
    Identifier "device1"
    Driver "nvidia"
    VendorName "NVIDIA"
    BoardName "NVIDIA GeForce 7 Series"
    BusID "PCI:1:0:0"
    Screen 0
EndSection

Section "Device"

 #
    Identifier "device2"
    Driver "nvidia"
    VendorName "NVIDIA"
    BoardName "NVIDIA GeForce 7 Series"
# Option "AddARGBVisuals" "True"
    Option "AddARGBGLXVisuals" "true"
# Option "XAANoOffscreenPixmaps" "false"
    BusID "PCI:1:0:0"
    Screen 1
EndSection

Section "Device"

 #
    Identifier "device3"
    Driver "nvidia"
    VendorName "NVIDIA"
    BoardName "NVIDIA GeForce 7 Series"
# Option "AddARGBVisuals" "True"
    Option "AddARGBGLXVisuals" "true"
# Option "XAANoOffscreenPixmaps" "false"
    BusID "PCI:9:0:0"
    Screen 0
EndSection

Section "Screen"
    Identifier "Default Screen"
    Device "Generic Video Card"
    Monitor "Generic Monitor"
    Option "HWCursor" "on"
    DefaultDepth 24
    SubSection "Display"
        Depth 1
        Modes "1920x1200" "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 4
        Modes "1920x1200" "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 8
        Modes "1920x1200" "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 15
        Modes "1920x1200" "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
        Depth 16
        Modes "1920x1200" "1024x768" "800x600" "640x480"
    EndSubSection
    SubSection "Display"
        Virtual 1920 1200
        Depth 24
        Modes "1920x1200" "1024x768" "800x600" "640x480"
    EndSubSection
EndSection

Section "Screen"

  #
    Identifier "screen1"
    Device "device1"
    Monitor "monitor1"
    DefaultDepth 24
# Option "MultiGPU" "AA"
    Option "SLI" "True"
    Option "HWCursor" "on"
# Option "AddARGBGLXVisuals" "True"
# Option "TripleBuffer" "True"
# Option "RenderAccel" "True"
# Option "AllowGLXWithComposite" "True"
# Option "XAANoOffscreenPixmaps" "false"
# Option "DisableGLXRootClipping" "True"
# Option "Coolbits" "1"
# Option "AddARGBVisuals" "True"
# Option "NoFlip" "True"
    SubSection "Display"
        Virtual 1920 1200
        Depth 24
        Modes "1920x1200@60" "1680x1050@60" "1600x1024@60" "1440x900@60" "1280x800@60" "1280x720@60" "1280x768@60" "800x600@60"
    EndSubSection
EndSection

Section "Screen"

 #
    Identifier "screen2"
    Device "device2"
    Monitor "monitor4"
    DefaultDepth 24
EndSection

Section "Screen"

 #
    Identifier "screen3"
    Device "device3"
    Monitor "monitor5"
    DefaultDepth 24
EndSection