14.04 with kernel 3.13.0-64-generic proposed enabled I get
SerialException

>>> import serial
>>> p = serial.Serial("/dev/ttyUSB0", timeout=1)
>>> p.read()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 460, in 
read
    raise SerialException('device reports readiness to read but returned no 
data (device disconnected?)')
serial.serialutil.SerialException: device reports readiness to read but 
returned no data (device disconnected?)

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https://bugs.launchpad.net/bugs/1397976

Title:
  tty hangup regression in 3.13 kernel (trusty LTS)

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