monitor offset

[Alex Deucher]

On 3/20/07, mansour77 at yahoo.com <mansour77 at yahoo.com> wrote:
>
> Hello every one:
> I having a little problem and I need an expert to help.
> I have 2 PC's running windows and Linux (Fedora 6). I use a KVM to
> switch back and forth. I can adjust the screen position to suit one of
> the PCs, but when I switch to the another one, I found an off set close
> to an inch. I find it very inconvenient to  keep  on adjusting my
> monitor for the PC I am working on. Therefore I decided to play a bit
> with Xorg and shift the coordinates of the display on Linux, since
> Windows will never let me do this. Unfortunately, no luck.
> I tried changing the parameters to the screen section in the
> serverLayout, then I tried to change the viewport, but nothing worked.
> Here's what I did:
>
>
> Section "Screen"
>        Identifier "Screen0"
>        Device     "Videocard0"
>        Monitor    "Monitor0"
>        DefaultDepth     24
>        SubSection "Display"
>                Viewport   120 0
>                Depth     24
>                Modes    "1400x1050" "1280x1024" "1280x960" "1280x800"
> "1152x864" "1024x768" "800x600" "640x480"
>        EndSubSection
> EndSection
>
> #########################################
> then I did this:
>
>
> Section "ServerLayout"
>        Identifier     "single head configuration"
>        Screen      0  "Screen0" absolute 120 0
>        InputDevice    "Keyboard0" "CoreKeyboard"
> EndSection
>
> ###########################
>
> nothing worked.
> Any idea ?

This has nothing to do with framebuffer offsets.  Each PC is driving
the monitor with slightly different timings.  You will need to adjust
your modelines to make both PCs display identically (even then there
may be some slight variation due to the vclk and crtc setup on the the
boards).

Alex