Solution to this problem seems to be very simple which i found after struggling with the problem for a year.
This is on the assumption that all of you have used the nvidia-settings utility to generate your xorg.conf file. Edit the /etc/X11/xorg.conf file and comment out or delete the below shown lines Section "Files" FontPath "unix/:7100" EndSection Save the file and restart GDM or lightDM which ever is your login manager using /etc/init.d/gdm restart or /etc/init.d/lightdm restart Now all of the QT applications like virtualbox and skype should not crash X -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/927288 Title: Xorg crash with qt4 apps using nvidia drivers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/927288/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp