resolutions for intel i855GM

[Keith Packard]

On Sun, 2007-10-07 at 18:15 +0200, davidek at ipnp.troja.mff.cuni.cz wrote:
> Hello,
>   ok, I found a way to introduce another mode:
> xrandr --newmode 1280x1024 80.14  1280 1344 1480 1680  768 769 772 795
> Then I can do xrandr --addmode .... , but I am still not there. The
> problems are:
> 1. I only can issue xrandr --newmode if VGa is not connected, otherwise it
> fails

that's because the VGA introduces the 1280x1024 mode, so you don't need
to create it.

> 2. when VGA is not connected, setting 1280x1024 works well. Then I connect
> VGA and run "xrandr --output VGA --mode 1280x1024". VGA switches correctly
> on, but the picture on LVDS gets distorted, all windows get "taller and
> narrower", basically it looks differently in this mode compared to the
> case when VGA was off.

The driver stretches the LVDS to hold the whole mode, so you end up with
non-square pixels at this resolution.

-- 
keith.packard at intel.com
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