After many experiments we discovered that this "garbling" is due to
interference between the program accessing the serial port and mspdebug,
which is used to load programs. During the programming process of the
msp430 we can see a warning message from mspdebug indicating:

"Warning:  rf2500: warning: can't detach kernel driver: No data
available"

After seeing this message, the output of the msp430 is garbled and
subsequent programming will be corrupted until there is a reboot.
Perhaps mspdebug should exit when it can't detach the kernel driver?

** Package changed: linux (Ubuntu) => mspdebug (Ubuntu)

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https://bugs.launchpad.net/bugs/943170

Title:
  tty output of MSP430 garbled

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