Mazli, there's no evidence in any of your log files of either a crash or a freeze (those are two different error conditions btw).
Do you have any log files with pertinent error messages? How are you concluding this is an Xorg freeze? The dependency on the internet connection sounds really odd and unusual; can you describe that aspect in more detail? Try booting Classic Desktop (No Effects) ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/763173 Title: Xorg freeze -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs