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  1. Qt
  2. QTBUG-78086

QSerialPort readyRead broken in 5.13.1, was fine in 5.13.0

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    • Windows

    Description

      The signal readyRead is never emitted, even if data is sent to the serial port from a connected device.

      The member bytesAvailable returns 0 even if data has been sent to the serial port from a connected device.

      The only way to have the signal readyRead emitted is receiving some data while waitForReadyRead is waiting.

      In Qt 5.13.0 all worked as intended: readyRead was emitted as soon as the new data was sent to the serial port from a connected device.

      The "Simple Terminal" example can be used to reproduce this bug.
      I've tried the one from Qt 5.13.0 and works fine with a test device (38400 | 8n1 | no flow control).
      The one from Qt 5.13.1 simply outputs nothing.

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          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-78113 QSerialPort not working

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-78149 QSerialPort::bytesWritten() never called on Windows 10

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-78475 QSerialPort readyRead signal isn`t emitted

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-78720 QSerialPort does not receive any data

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-74961 While reading and writing continously via a QSerialPort it is leaking memory

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              kuzulis Denis Shienkov
              jubba Claudio Barutta
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              Dates

                Created:
                Updated:
                Resolved:

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