Screen turns black suddenly, then re-emerges within a second

Question

Hi,
here's a new strange issue with my new Asus Eee PC: Recently, and perhaps it's because some updated packages, the screen turns black totally without warning, and shows up again as if nothing has happened. That is, no matter what I currently do, at any time the screen turns completely black (not even dark or something like that) for just a second, and appears again simply. Nothing strange can be noticed, my session just continues as if this didn't happen.
I haven't had any success finding the triggers for that behaviour, it seems so accidentally ... be it browsing the web, right after session startup and everything else. What I've noticed though is that it happens only a single time within a session and both on battery and on power.
Graphic chip is an Intel Mobile 945 GME, and I'll add my xorg.conf as soon as I can. Strangely, there is no note in Xorg.0.log either.
What I'm currently doing now is checking whether this also happens in a GNOME session. Sounds strange, but the first time I've noticed this behaviour is with Openbox, and the last days I was using only Openbox. Still I don't know whether Openbox might cause this problem.
I'd be very glad if someone could give me some hints on tracking down this issue. Perhaps this also happens at someone else's machine.
Gratefully,
Leye
EDIT
Alright, here's my xorg.conf:
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/TTF"
FontPath "/usr/share/fonts/Type1"
EndSection
Section "Module"
Load "record"
Load "dri2"
Load "glx"
Load "dbe"
Load "extmod"
Load "dri"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
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 "NoAccel" # [<bool>]
#Option "SWcursor" # [<bool>]
#Option "ColorKey" # <i>
#Option "CacheLines" # <i>
#Option "Dac6Bit" # [<bool>]
#Option "DRI" # [<bool>]
#Option "NoDDC" # [<bool>]
#Option "ShowCache" # [<bool>]
#Option "XvMCSurfaces" # <i>
#Option "PageFlip" # [<bool>]
Option "AccelMethod" "exa"
Option "MigrationHeuristic" "greedy"
Option "DRI" "True"
Option "NoDDC" "True"
Option "XAANoOffscreenPixmaps" "True"
Option "EnablePageFlip" "True"
Option "RenderAccel" "True"
Identifier "Card0"
Driver "intel"
VendorName "Intel Corporation"
BoardName "Mobile 945GME Express Integrated Graphics Controller"
BusID "PCI:0:2:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x600
EndSubSection
EndSection
Section "Extensions"
Option "Composite" "Enable"
EndSection
Last edited by Leye (2009-06-16 14:31:52)

Answer 1

Good to know that there are other people with the same issue as well. As long as I use Openbox, I've deactivated gnome-power-manager, though I hope this will go away with new updates. In the meantime, deactivating gnome-power-manager is o.k.
I don't know though what you should do if you rely on the whole GNOME desktop.