What causes message ttyR : 1 input overrun(s)

Posted on 2006-04-04
Last Modified: 2013-12-16
I have several RocketPort connectors on my Linux server, running Red Hat 7.1. This message keeps coming up on the master console. I have tried unplugging the connector on ttyR1, and removed it from the inittab and the message still keeps coming up. I contacted Comtrol and they said it wasn't one of their error messages.
Question by:Mid-Atlantic-Data
    LVL 22

    Accepted Solution

    This is normally a configuration error. Due to the 'robust' quality of the Rocket Port setup, if you set to receive at 192, and the device is transmitting at 9600, you *may* get some charachters receives, however, the chars will not be received smoothly, and will be totally unrelated to what is transmitted. In addition, there can be issues relating to synchronisation of the transmitting and receiving port. Therefore check the configuration of all ports concerned.

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    Author Comment

    More than likely this is what is happening. The dumb terminals I have attached are running at 9600 baud, /etc/inittab has them defined at 9600 baud. However, I have tried to understand setserial manual pages and cannot figure out what command to issue to see what the rocket port is configured at.
    Could you help me out please.
    LVL 22

    Expert Comment

    setserial -a /dev/ttyS0

    should enable you to see what the settings are for the appropriate device.


    Author Comment

    I type in
    setserial -a /dev/ttyR1
    it gives message
    cannot get serial info: Invalid argument

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