Min Pae, the posts I found across the web is that this is usually caused by bad electric contact of the usb plug. I suggest you verify there's no residues inside the plug and maybe clean it with cotton swabs... As it seems, the real bug is that when this problem happens the system freezes for several seconds from time to time.
-- USB ports: connect-debounce failed, port disabled https://bugs.launchpad.net/bugs/88530 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
