Sometimes I connect an external LCD monitor to my laptop but by default Fedora 9 doesn’t use the native resolution and selects 1280×1024. This results in suboptimal image quality and loss of valuable screen estate (after all I’m connecting an external screen because the built-in LCD in the laptop is too small!). Which is weird considering that the OS detected the monitor configuration using DDC and the native mode is listed if you run xrandr.
It turns out the OS needs some help before it will automatically use the native mode. The modifications are limited to xorg.conf file.
First make sure DDC is NOT disabled in xorg.conf (/etc/X11/xorg.conf); this would be indicated by the line:
Option "DDC" "false"
make sure the above line is NOT present or comment it out.
Then add this section:
Section "Monitor"
Identifier "FUS L22W-7SD"
Option "DPMS" "true"
Option "PreferredMode" "1680x1050"
Option "RightOf" "LVDS"
EndSection
Finally look in the file for:
Section "Screen"
and within add this line:
Option "monitor-VGA" "FUS L22W-7SD"
After that restart X server (in Fedora 9 it’s enough to logout).
Now you can enjoy the 1680×1050 resolution!
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