Oh well, so as you are expert, can you please follow this step, in particular 3g. Thanks
https://wiki.ubuntu.com/DebuggingNetworkManager#Getting_debug_logs --- Ubuntu Bug Squad volunteer triager http://wiki.ubuntu.com/BugSquad -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/995130 Title: BCM4321 Wireless dropping connection randomly with no indication To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/995130/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs