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Managing System Information, Processes, and Performance in Oracle® Solaris 11.4

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Updated: April 2019

How to Set the Baud Rate Speed on the Console

Support for console speeds on x86 based systems are dependent on the specific platform.

    The following console speeds are supported on a SPARC based system:

  • 9600 bps

  • 19200 bps

  • 38400 bps

  1. Become an administrator.

    See Using Your Assigned Administrative Rights in Securing Users and Processes in Oracle Solaris 11.4.

  2. Use the eeprom command to set a baud rate speed that is appropriate for your system type.
    # eeprom ttya-mode=baud-rate,8,n,1,-

    For example, to change the baud rate on an x86 based system's console to 38400, type:

    # eeprom ttya-mode=38400,8,n,1,-
  3. Change the console line in the /etc/ttydefs file as follows:
    console baud-rate hupcl opost onlcr:baud-rate::console
  4. Make the following additional changes for your system type.

    Note that these changes are platform-dependent.

    • On SPARC based systems: Change the baud rate speed in the version of the options.conf file that is in the /etc/driver/drv directory.

      For example, to change the baud rate to 9600:

      # 9600             :bd:

      To change the baud rate speed to 19200:

      # 19200            :be:

      To change the baud rate speed to 38400:

      # 38400            :bf:
    • On x86 based systems: Change the console speed if the BIOS serial redirection is enabled.