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Dell Chassis Management Controller Version 1.3 for PowerEdge FX2/FX2s User's Guide

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Configuring Linux for server serial console redirection during boot

The following steps are specific to the Linux GRand Unified Bootloader (GRUB). Similar changes are necessary for using a different boot loader.
  • NOTE: When you configure the client VT100 emulation window, set the window or application that is displaying the redirected console to 25 rows×80 columns to make sure proper text is displayed. Else, some text screens will appear distorted.

Edit the /etc/grub.conf file as follows:

  1. Locate the general setting sections in the file and type the following two new lines: 
    serial --unit=1 --speed=57600
                                    terminal --timeout=10 serial
  2. Append two options to the kernel line: 
    kernel console=ttyS1,57600
  3. If the /etc/grub.conf contains a splashimage directive, comment it out. The following example shows the changes described in this procedure. 
    # grub.conf generated by anaconda
                                    #
                                    # Note that you do not have to rerun grub after making
                                    changes
                                    # to this file
                                    # NOTICE: You do not have a /boot partition. This
                                    means that
                                    # all kernel and initrd paths are relative to
                                    /, e.g.
                                    # root (hd0,0)
                                    # kernel /boot/vmlinuz-version ro root=
                                    /dev/sdal
                                    # initrd /boot/initrd-version.img
                                    #
                                    #boot=/dev/sda
                                    default=0
                                    timeout=10
                                    #splashimage=(hd0,2)/grub/splash.xpm.gz
                                    
                                    serial --unit=1 --speed=57600
                                       terminal --timeout=10 serial
                                    
                                    title Red Hat Linux Advanced Server (2.4.9-e.3smp)
                                    root (hd0,0)
                                    kernel /boot/vmlinuz-2.4.9-e.3smp ro root=
                                    /dev/sda1 hda=ide-scsi console=ttyS0 console=
                                    ttyS1,57600
                                    initrd /boot/initrd-2.4.9-e.3smp.img
                                    title Red Hat Linux Advanced Server-up (2.4.9-e.3)
                                    root (hd0,00)
                                    kernel /boot/vmlinuz-2.4.9-e.3 ro root=/dev/sda1
                                    initrd /boot/initrd-2.4.9-e.3.img

    When you edit the /etc/grub.conf file, follow these guidelines:

    • Disable GRUB's graphical interface and use the text-based interface. Else, the GRUB screen is not displayed in console redirection. To disable the graphical interface, comment out the line starting with splashimage.
    • To start multiple GRUB options to start console sessions through the serial connection, add the following line to all options: 
      console=ttyS1,57600

      The example shows console=ttyS1,57600 added to only the first option.

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