Hello, your logs are full of very unhappy messages. I'm hoping that this is the root of all your problems:
[ 1509.531045] usb usb3-port11: Cannot enable. Maybe the USB cable is bad? but it's possible that your hardware is broken enough that this is just a bad guess. I suggest finding someone to help you troubleshoot your problems with you, either from IRC or askubuntu.com or a local user group, etc. Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2067971 Title: System crached when using multi internet browsers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/2067971/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs