can't get 1680x1050 with intel-1.9.91

Ross Burton ross at
Fri Mar 9 06:00:29 PST 2007

On Fri, 2007-03-09 at 15:25 +0200, Timo Aaltonen wrote:
>    I'm trying to get a Lenovo ThinkCentre M55 with a Lenovo 22" D221 flatpanel 
> to display the native resolution of 1680x1050, but I only get 1280x800 no 
> matter what I try. I get the same resolution with a Sun 19" flat (1280x1024 
> native) so something funky is going on. This is with xorg-server and 
> xf86-video-intel 1.9.91 built on Ubuntu Feisty (current development 
> version).

Looks like you might have the same problem I have -- the new
driver/server has trouble reading EDID from the external display.

My xorg.conf contains this:

Section "Monitor"
        Identifier "Dell TFT"
        Modeline "1680x1050" 149.00  1680 1760 1944 2280  1050 1050 1052 1089

Section "Screen"
        Identifier      "Default Screen"
        Device          "Intel Corporation Mobile Integrated Graphics Controller"
        Monitor         "Generic Monitor"
        Option "monitor-VGA" "Dell TFT"
        DefaultDepth    24
        SubSection "Display"
                Virtual 1680 1050

Which tells the intel driver to add the specified modeline to the list
of valid modes on the VGA output.  With this I can randr up to 1680x1050
on the external display if I turn off the local panel.

Ross Burton                                 mail: ross at
                                          jabber: ross at
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