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I tried to compile and install X.org (for a single card/multiseat in this tutorial) by getting source from here and installing it by: 

./configure --enable-kdrive --enable-xephyr --enable-xfake --enable-xfbdev --enable-kdrive-kbd --enable-kdrive-mouse --enable-kdrive-evdev --enable-glx-tls
make
sudo make install

after this Ubuntu freezes in boot on the Ubuntu logo and doesn't boot up!
Note: it boots in recovery mode and X starts by using startx from terminal (in recovery mode) ; it just doesn't start normally!
I'm using Ubuntu 12.04

What is the problem?
How can I fix it?

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could you upload the X.log and dmesg logs? It sounds as if the hardware discovery doesn't work – Hartmut Oct 2 '12 at 8:59
@Hartmut: currently i checked boot output; lightdm fails! – 4r1y4n Oct 2 '12 at 12:27

3 Answers

up vote 2 down vote accepted

Have you generated an xorg.conf file? Try booting into recovery mode, and running this command:

$ Xorg -configure

That will create an xorg.conf file at /root/xorg.conf.new. Edit the file as needed and copy it to /etc/xorg.conf. Reboot and see if it works.

If that doesn't work, try generating an xorg.conf file using nvidia-xconfig. You will also probably need to reconfigure the driver. try the following:

sudo apt-get install module-assistant nvidia-kernel-common nvidia-kernel-dkms nvidia-settings nvidia-xconfig
sudo m-a auto-install nvidia-kernel${VERSION}-source
sudo nvidia-xconfig
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it gives Missing output drivers. Configuration failed !! – 4r1y4n Oct 2 '12 at 12:19
Excellent! Edit your Device section to give the right drivers ('radeon' for ATI, 'nouveau' for nvidia). Also install them if necessary. See the Arch Wiki [wiki.archlinux.org/index.php/Xorg](here) for more information. – terdon Oct 2 '12 at 12:34
But there is no xorg.conf to edit! Xorg -configure gives this error! – 4r1y4n Oct 2 '12 at 12:42
Ah, have you installed the drivers for your card? What is your card? – terdon Oct 2 '12 at 12:56
before compiling Xorg , yes (on previous X) ; it is nVidia 210 – 4r1y4n Oct 2 '12 at 13:20
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up vote 1 down vote

Try to press "End" wile showing the logo to see where it stops so we can have a better idea on what to do next, but xorg.log might tell you something too.

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1  
It fastly shows outputs and clears screen then it prompt for username (TTY terminal login) – 4r1y4n Oct 2 '12 at 9:52
Terminal login? Hum, seems that X is not starting at all, but I guess you could check that with ps or top. Are you sure you've setup "/usr/bin/startup-X':" script (described in the tutorial correctly)? – Mikec Oct 2 '12 at 10:02
currently i checked boot output; lightdm fails! – 4r1y4n Oct 2 '12 at 12:29
you could try to do a sudo apt-get update and reinstall lightdm after that. Or maybe even instal gdm and see if you can get the login screen. – Mikec Oct 3 '12 at 10:27
.... But the xorg.log must mention something more... Make sure you have the latest graphic drivers, and check if for instance you have an intel, but nvidia grapichs are instaled, I had problems with lightgm once because of that... – Mikec Oct 3 '12 at 10:34
up vote 0 down vote

Ubuntu 10.04 used to refuse to boot X, when xorg.conf was present (it was left from 9.10). I removed it and it booted ok.

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tried but no effect! – 4r1y4n Oct 2 '12 at 12:19

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