openbox & gnome with dual head

[wd]

Hi everyone,

I use a Compaq nx6130 laptop and a external Dell lcd. I use virtual to
create a big desktop.

Section "Screen"
    Identifier "Default Screen"
    Device     "Generic Video Card"
    Monitor    "Integrated LCD"
    DefaultDepth     24
    SubSection "Display"
        #Modes    "1280x1024" "1024x768"
        Modes    "1024x768"
        #Virtual 2304 1024
        Virtual 2048 1024
    EndSubSection
EndSection

When the resolution is different between intergrated and external LCD(
virtual 2304 1024, the intergrated lcd will use 1024x768 and the other will
use 1280x1024 ), I maximnm a window in the intergrated lcd , the window will
only expand to half of the screen, like
this<http://img116.imageshack.us/img116/4375/200812301610401026x760swh8.png>
.

When I use virtual 2048 1024, everything works ok.

Is this a bug ? Or how can I fix this ?

I use gentoo, ~x86, openbox 3.4.8_rc1. Thanks.
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