QA:Testcase nouveau restartx

Description

This test case tests whether, when using the Nouveau driver, X can successfully shut down and restart.

How to test

1. Enable the nouveau driver. You may need to install the driver package, and download this file and install it as /etc/X11/xorg.conf
2. Shut your system down entirely, then start it up again, in console mode. When the boot prompt appears, hit a key to allow you to change the boot options. Hit the 'e' key on the default entry, select the kernel options line, hit 'e' again, and add simply a space and the number '3' to the end of the line. Then boot with that change
3. The system will boot to the console. Log in as a normal user (if using the liveCD the username is: 'liveuser' no password will be needed)
4. Start X:

   startx

   . Verify that it works as usual
5. Log out from your desktop environment. This should stop X and return you to the console. Check there are no unusual errors
6. Start X again:

   startx

   . Again test that it works as usual

Expected Results

1. X should work properly both the first and second times it is started