projector (external monitor) howto on Intel i915gm

[Austin Yuan]

On 2/22/06, m h <sesquile at gmail.com> wrote:
> I'm on track to getting this.  I had to set my xorg.conf to this:
>
> Section "Device"
>        #external monitor
>        Option       "Clone" "yes"
>        Option       "MonitorLayout" "CRT,LFP"
>
>        Identifier  "Card0"
>        Driver      "i810"
>        VideoRam    65536
>        VendorName  "Intel Corp."
>        BoardName   "Unknown Board"
>        BusID       "PCI:0:2:0"
> EndSection
>
>
> this is what I had previously that didn't work:
> Section "Device"
>        #For external monitors (projector)
>        Option      "MonitorLayout" "CRT,LFP"
>        Option      "Clone" "On"
>        Option      "DevicePresence""yes"
>        #end external
>
>        Identifier  "Card0"
>        Driver      "i810"
>        VideoRam    65536
>        VendorName  "Intel Corp."
>        BoardName   "Unknown Board"
>        BusID       "PCI:0:2:0"
> EndSection
>
> Now I can get external output on my vga port!  But I need to know how
> to specify the mode for the external vga port.  The screen on my
> laptop is 1400x1050, but I doubt that any projector has that for a
> native resolution.  Does anyone know how to specify
> modelines/resolution for only the vga port?
>
Because you use "Clone" mode, your laptop and projector will have the
same resolution. If you want to set different resolutions for laptop
and projector, you could configure two seprate "Screens" with
different resolutions. "man xorg.conf" for detail information