Do you have any files in /etc/modprobe.d/ that does not have a .conf extension? If you have, then this could be a duplicate of bug 1376966.
Log in to the root console, and run the following to check: ls /etc/modprobe.d/|grep -v '\.conf$' -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to ubuntu-drivers-common in Ubuntu. https://bugs.launchpad.net/bugs/1373968 Title: GUI does not work after update Status in “ubuntu-drivers-common” package in Ubuntu: New Bug description: After logging into PC today and running the software updater, various system updates were downloaded. I was promped to restart, which I did. At reboot, the system would get as far as displaying the login screen. After I entered my password, the system appears to hang, with no disk activity. I have a dual monitor system, but only the left monitor is active, in that it displays a purple Ubuntu splash screen, without the login box. I have tried restarting a number of times, but the result is always the same. I can log in by using the advanced options and drop into the root console. I am using Ubuntu 14.04.1 LTS. uname -a reports 3.11.0-20-generic #34-Ubuntu SMP Tue Apr 1 20:40:25 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Hardware is a Dell Precision T3400 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1373968/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

