Googling the error brought me here, also experiencing this issue with my
Vantage weather station and weewx software being unable to access the
station console after updating yesterday.  Will roll back kernel

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https://bugs.launchpad.net/bugs/1501240

Title:
  Serialport doens't work correctly after ubuntu update?

Status in python2.7 package in Ubuntu:
  Confirmed

Bug description:
  I have a strange problem with my serial port. It seems that sth has changed 
after ubuntu updates and reboot. 
  When I try to open serial port in python I get exception: 

  'device reports readiness to read but returned no data (device
  disconnected or multiple access on port?)'

  przem@przem:~/Pulpit/bat/scripts$ python
  Python 2.7.6 (default, Jun 22 2015, 17:58:13) 
  [GCC 4.8.2] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import serial
  >>> ser = serial.Serial("/dev/ttyUSB0", 57600)
  >>> ser.read()
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "/usr/local/lib/python2.7/dist-packages/serial/serialposix.py", line 
475, in read
      raise SerialException('device reports readiness to read but returned no 
data (device disconnected or multiple access on port?)')
  serial.serialutil.SerialException: device reports readiness to read but 
returned no data (device disconnected or multiple access on port?)
  >>> 

  I know that there are also different users who has this problem. 
  more info:
  
http://superuser.com/questions/979722/serialport-doenst-work-correctly-after-ubuntu-update

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