Different resolutions on pipe a and b, i810 (855gm)

Wu, Nian nian.wu at intel.com
Sun Apr 29 22:20:42 PDT 2007

Gero Mudersbach wrote:
> Hello,
> I have a question regarding the i810 driver:
> Is it possible to have two different resolutions at the same time on
> the local flat panel and the external crt?
Yes. You can use xrandr to set different modes on different monitors.
for example:
xrandr --output LVDS --mode 1024x768
xrandr --output VGA --mode 1680x1050

You also can config in xorg.conf, for example:

Section "Device"
        Identifier      "Intel Corporation 945G Integrated Graphics
        Driver          "intel"
        BusID           "PCI:0:2:0"
        Option          "monitor-VGA"   "foo"
        Option          "monitor-LVDS"  "lvds"
        Option          "DRI" "true"

Section "Monitor"
        Identifier      "foo"
        Option "PreferredMode"  "1024x768"
	Option "RightOf" "lvds"

Section "Monitor"
        Identifier      "lvds"
         Option "PreferredMode"  "1024x768"
	Option          "Position" "0 0"

> I have a notebook with the Intel Corporation 82852/855GM controller.
> (lspci gives me:
> 00:02.0 VGA compatible controller: Intel Corporation 82852/855GM
> Integrated Graphics Device (rev 02))
> I would like to connect my widescreen Samsung SyncMaster 225BW to the
> external pipe A when I am at work and use the built in flat panel
> only when I am anywhere else.
> Also I cannot get the i810 driver to set the resolution of 1680x1050
> on the external pipe only, so at the moment I have 1024x768 only. In
Someone else also complain this. See bug #10814.

> clone mode I have a resolution of 1400x1050 which looks not nice.
> Regards,
> Gero
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