Pyserial and Ubuntu Linux kernel 3.13.0-65-generic

From	Rob Gaddi <rgaddi@technologyhighland.invalid>
Newsgroups	comp.lang.python
Subject	Pyserial and Ubuntu Linux kernel 3.13.0-65-generic
Date	2015-10-02 22:36 +0000
Organization	A noiseless patient Spider
Message-ID	<mun0t7$68r$1@dont-email.me> (permalink)

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So, this is odd.  I'm running Ubuntu 14.04, and my system did a kernel 
upgrade from the repository from 3.13.0-63-generic to 3.13.0-65-generic.  
And pyserial (2.7, installed through pip) stopped working.

Specifically, when I make read() calls on a Serial object, I get the error

serial.serialutil.SerialException: device reports readiness to read but 
returned no data (device disconnected?)

This comes from the PosixSerial.read() method in serialposix.py, and 
seems to be a result of the select.select call screwing up.

I reboot under 3.13.0-63-generic.  My code works.  I reboot under 
3.13.0-65-generic.  My code doesn't.  Implication would seem to be that 
somehow between these kernel versions, the select() logic in the serial 
driver changed.  This happens regardless of whether the serial port is 
real, FTDI USB-UART, or Prolific USB-UART.

Can anyone else confirm?  Also, who do I try to report this one to?

Thanks,
Rob

-- 
Rob Gaddi, Highland Technology -- www.highlandtechnology.com
Email address domain is currently out of order.  See above to fix.

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Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Rob Gaddi <rgaddi@technologyhighland.invalid> - 2015-10-02 22:36 +0000
  Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Grant Edwards <invalid@invalid.invalid> - 2015-10-02 23:36 +0000
  Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Laura Creighton <lac@openend.se> - 2015-10-03 11:07 +0200
  Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Laura Creighton <lac@openend.se> - 2015-10-03 11:12 +0200
    Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Rob Gaddi <rgaddi@technologyhighland.invalid> - 2015-10-05 16:34 +0000
  Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Laura Creighton <lac@openend.se> - 2015-10-03 11:19 +0200
  Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Michael Torrie <torriem@gmail.com> - 2015-10-03 08:38 -0600
  Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Laura Creighton <lac@openend.se> - 2015-10-03 18:23 +0200
    Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Grant Edwards <invalid@invalid.invalid> - 2015-10-06 21:31 +0000
      Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Rob Gaddi <rgaddi@technologyhighland.invalid> - 2015-10-06 21:46 +0000
      Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Laura Creighton <lac@openend.se> - 2015-10-06 23:51 +0200
  Re: Pyserial and Ubuntu Linux kernel 3.13.0-65-generic Dave Farrance <df@see.replyto.invalid> - 2015-10-07 09:29 +0100

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