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when booting with ubuntu 12.04, I sometimes get a huge error that prevents me from getting to the log in screen. The error window I get is this one (though the image isn't mine, I'm not running a VM: http://i.imgur.com/QaP9d.png).
I think this is due to my graphic card (nvidia 680 gtx). I have the recommended (proprietary) driver.
The log files can be found here http://speedy.sh/nvNuB/failsafeX-backup.tar.gz.
Thanks for your answer.
I'm sorry I really don't understand what you're talking about, I'm new to linux and I have no idea what you're talking about.
Could you give further details, in precise steps, as to what I am supposed to attempt, and the possible associated risks ?
What GlennsPref is trying to explain is that your system is for whatever reason configured to use two drivers for the videocard at the same time (the proprietary driver and the free driver), which, as you can see, will lead to problems. The solution is to prevent the free driver from loading. To do that create a new file blacklist-nouveau.conf in the directory /etc/modprobe.d (or use an already existing blacklist file, as suggested by GlennsPref) and add the line
to it. Since you need root privileges to access that directory the easiest way for Ubuntu would be to open a terminal and start the texteditor with
sudo gedit /etc/modprobe.d/blacklist-nouveau.conf
Feel free to substitute gedit in that command with your favorite text editor, if you want. Save that file, then make sure that you have a valid xorg.conf file, this can easily be done with the command
If you now restart the system your problems should be solved.
Ok thanks for this explanation, it was easier to understand.
So I did just that, and I added the line
to the file /etc/modprobe.d/blacklist-nouveau.conf, which I had to create.
I then wrote 'sudo nvidia-xconfig'. It said that no previous configuration was found, and thus a new one had to be created.
Then I rebooted.
But the problem is still there.
After rebooting once again, I was able to go straight to the login screen.
But this was already the case before the above-mentioned manipulation, my problem was that *only sometimes* did I have problems booting. Given your explanations, this randomness could be due to the fact that one driver is picked up over the other in some cases, making it impossible to boot.
The problem in this case is not that the free driver is loaded, as it seemed to be the problem before, but that the proprietary driver module could not be found. Do you have made any changes to the system before this happened?