annozing flicker

[wgitscht]

i got an acer aspire 1511lmi notebook with nforce 3 and geforce 5700 go graphic. 1024x768 display and amd64 cpu. Gentoo 64 is running on it smoothly and i installed the latest nvidia kernel and glx by emerge version is 1.0.6111. everything is working fine, even twinview etc.
But every few minutes ( 1-5 not a fixed value ) the whole screen is flickering for a very short moment and 3 bars distord it.. this is just for less than a second... but very annoying. if i use a external crt monitor this problem doesnt occur.


kernel is 2.6 amd64
my xorg.conf follows:

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

Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
ModulePath "/usr/X11R6/lib/modules"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/TTF"
FontPath "/usr/share/fonts/Speedo"
FontPath "/usr/share/fonts/Type1"
FontPath "/usr/share/fonts/CID"
FontPath "/usr/share/fonts/75dpi"
FontPath "/usr/share/fonts/100dpi"
FontPath "/usr/local/share/fonts"
FontPath "/usr/share/fonts"
FontPath "/usr/X11R6/lib/X11/fonts"
FontPath "/usr/share/fonts/cyrillic"
FontPath "/usr/share/fonts/local"
FontPath "/usr/share/fonts/ukr"
EndSection

Section "Module"
Load "extmod"
# Load "dri"
Load "dbe"
Load "record"
Load "xtrap"
Load "glx"
Load "speedo"
Load "type1"
Load "freetype"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/mouse"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection

Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "DigitalVibrance" # <i>
#Option "NoFlip" # [<bool>]
#Option "Dac8Bit" # [<bool>]
#Option "NoLogo" # [<bool>]
#Option "UBB" # [<bool>]
#Option "Stereo" # <i>
#Option "SWcursor" # [<bool>]
#Option "HWcursor" # [<bool>]
#Option "VideoKey" # <i>
#Option "NvAGP" # <i>
#Option "IgnoreEDID" # [<bool>]
#Option "NoDDC" # [<bool>]
#Option "ConnectedMonitor" # <str>
#Option "ConnectedMonitors" # <str>
#Option "TVStandard" # <str>
#Option "TVOutFormat" # <str>
#Option "RenderAccel" # [<bool>]
#Option "CursorShadow" # [<bool>]
#Option "CursorShadowAlpha" # <i>
#Option "CursorShadowXOffset" # <i>
#Option "CursorShadowYOffset" # <i>
Option "UseEdidFreqs" # [<bool>]
#Option "FlatPanelProperties" # <str>
Option "TwinView" # [<bool>]
Option "TwinViewOrientation" "clone" # <str>
#Option "SecondMonitorHorizSync" # <str>
#Option "SecondMonitorVertRefresh" # <str>
Option "MetaModes" "1024x768,1024x768" # <str>
#Option "UseInt10Module" # [<bool>]
#Option "NoTwinViewXineramaInfo" # [<bool>]
#Option "NoRenderExtension" # [<bool>]
#Option "Overlay" # [<bool>]
#Option "CIOverlay" # [<bool>]
#Option "ForceEmulatedOverlay" # [<bool>]
#Option "TransparentIndex" # <i>
#Option "OverlayDefaultVisual" # [<bool>]
#Option "NvEmulate" # <i>
#Option "NoBandWidthTest" # [<bool>]
#Option "CustomEDID-CRT-0" # <str>
#Option "CustomEDID-CRT-1" # <str>
#Option "CustomEDID-DFP-0" # <str>
#Option "CustomEDID-DFP-1" # <str>
#Option "CustomEDID-TV-0" # <str>
#Option "CustomEDID-TV-1" # <str>
#Option "TVOverScan" # <f>
#Option "IgnoreDisplayDevices" # <str>
#Option "MultisampleCompatibility" # [<bool>]
#Option "RegistryDwords" # <str>
#Option "NoPowerConnectorCheck" # [<bool>]
#Option "AllowDFPStereo" # [<bool>]
#Option "XvMCUsesTextures" # [<bool>]
#Option "HorizSync" # <str>
#Option "VertRefresh" # <str>
Identifier "Card0"
Driver "nvidia"
VendorName "nVidia Corporation"
BoardName "Unknown Board"
BusID "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection

thx in advance
werner