Such problems are often common with development releases. Seems like an xorg/driver issue to me.
** Also affects: xorg (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/906861 Title: Unity 3D froze during some minuts after login To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/906861/+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