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Luckily I have attempted it in a VMWare environment, and have taken a snapshot right before the upgrade. In addition, my FreeNX connection that used to work now would not (probably same cause).

I am able to log in on the console, when I hit Ctrl - Alt - F1. However, I am no Linux pro, and I am not sure which log file(s) to start with, or what to try.

Would you kindly walk me though this? I will post my steps as I go.

Hardware: http://archive.slickdeals.net/showthread.php?t=1212747

$uname - a
Linux [name] 2.6.28-19-generic #66-Ubuntu SMP Sat Oct 16 18:00:58 UTC 2010 x86_64 GNU/Linux
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2  
me too. i think it's because i am using closed source drivers. –  hbdgaf Nov 27 '10 at 19:08

4 Answers 4

up vote 1 down vote accepted

This seems like the same/very similar question resolved:

No GUI after upgrade to Ubuntu 9.10 (boots to command line)

Good luck.

[EDIT]: If this doesn't resolve your problem, attempt to replace your xorg.conf from /etc/X11 with one of the standard configurations. Then, once you've restart the x11 server, you can attempt to re-install your graphics drivers.

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Something like this worked for me: http://mikebeach.org/2010/06/nvidia-proprietary-drivers-and-low-resolution-plymouth-splash-screen/ it doesn't perform perfectly and without glitches on shutdown every time, but you ALWAYS get the boot graphic

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all the fancypants visual effects still load for compiz and video doesn't get choppy, so I'm satisfied –  hbdgaf Nov 30 '10 at 20:08

You can try to reinstall xorg :

sudo apt-get install xorg

Then follow by Sathya's suggestion to reconfigure xorg:

sudo dpkg-reconfigure xserver-xorg

or

sudo xorgconfig

If that doesn't help, you might check if Grub2 was correctly installed by the 9.10 upgrade.
From How To Check Installed GRUB Version Number :

grub-install -v
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It boots into non-graphic mode. Why would Grub2 affect anything? How can I check that Grub2 was installed correctly? –  Fantomas Nov 30 '10 at 15:31
    
I have added the check. Ubuntu 9.10 comes with Grub2, so if the upgrade had a problem you might not have it. –  harrymc Nov 30 '10 at 15:58
    
Cool, the first command led me to: ubuntuforums.org/showthread.php?t=388348 –  Fantomas Dec 1 '10 at 14:49

I'd start by examining X.org log files, located at /var/log/X.0.log.

Try reconfiguring X server.

sudo dpkg-reconfigure xserver-xorg
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