In a message of Sat, 03 Oct 2015 11:07:04 +0200, Laura Creighton writes: >In a message of Fri, 02 Oct 2015 22:36:23 -0000, Rob Gaddi writes: >>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. >>-- >>https://mail.python.org/mailman/listinfo/python-list > >I think you have this bug >https://bugs.launchpad.net/ubuntu/+source/linux/+bug/460857 > >or rather, you like the behaviour that ubuntu thinks is buggy, >which never got fixed, and don't like that it changed to be >what ubuntu thinks is correct in .65. > >I'd talk to the pyserial issue tracker as the people there ought >to be well aware of this problem, and then see if talking to >ubuntu is the right thing to do. > >Laura >-- >https://mail.python.org/mailman/listinfo/python-list
I think I said that poorly. What I think happened is that ubuntu made some changes to fix this problem, and along the way they managed to break things for you, and maybe all pyserial users. But I would talk to the pyserial people about that. Laura -- https://mail.python.org/mailman/listinfo/python-list
