Public bug reported:

New jockey 0.4+r345-0ubuntu1 can now install and enable restricted
drivers directly from the intrepid a4 LiveCD, so people can test nvidia
drivers and compiz even before installing ubuntu.

However, when doing this, a more important problem happens. If nvidia
drivers are installed during the LiveCD session, once the computer has
rebooted to the new intrepid installation, X will fails to start and
fall to safe mode. Strangely, almost all changes that has been made
inside the LiveCD session seems to have persisted. nvidia-* packages are
all marked as installed in synaptic and /etc/X11/xorg.conf is already
configured to use proprietary nvidia driver (Driver        "nvidia"
Option "NoLogo"        "True").

This problem will always reproduce, regardless of the number of reboot.
It's possible to fix this problem with a simple re-installation of all
"nvidia-*" packages in synaptic, after what X really uses nvidia driver.

Steps to reproduce :
1. Have a computer with a nvidia card which needs nvidia restricted drivers.
2. Boot intrepid alpha 4 LiveCD
3. Inside the LiveCD session, install nvidia drivers through Hardware Drivers 
and reload X with CTRL + ALT + Backspace
4. Install Ubuntu and reboot

Results :
The freshly installed ubuntu intrepid a4 will boot, but X will fail 3 times to 
load and then fall in failsafe mode.

** Affects: jockey (Ubuntu)
     Importance: Undecided
         Status: New

-- 
X fall in failsafe mode after install if nvidia restricted drivers are 
installed during LiveCD session in intrepid
https://bugs.launchpad.net/bugs/258486
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