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I have a xorg.conf that works in Ubuntu 9.10. The xorg.conf adds a new modeline and setup dual monitors. Last week, I updated to Lubuntu 11.10, and sadly found that the same xorg.conf doesn't work anymore. To be more precisely, I did see the wallpaper showed in the correct resolution in the beginning, but then my first monitor, Dell 2007FP, turned black. I checked with xrandr -q, and found that the new modeline doesn't exist. I also tested the same xorg.conf in debian 6.03, no problem at all. My guest is that the new Lubuntu adds some kind of screen auto detection, and this clears the setting in xorg.conf, and .xprofile. Is it possible to turn off the auto detection process?

My system is IBM T42 with ATI RV250 chipset. The Dell 2007FP has a native resolution 1600x1200.

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Can you post it? –  BЈовић Nov 14 '11 at 6:31
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1 Answer 1

(L)Ubuntu now uses the config directory

/etc/X11/xorg.conf.d

the old

/etc/xorg.conf

should still work, however, settings in a config file within this directory are loaded after xorg.conf and could override settings within this file. So please check the contents of this directory as well.

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/etc/X11/xorg.conf.d that directory doesn't exist –  marinara Nov 18 '11 at 3:29
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