A basic hardware probe to determine if you should change the default serial ordering in grub.conf. This pre-supposes that you know your hardware is broken. You can tell something is wrong with your hardware if it takes lots of time to iterate through the “Press a key” option and present you with the grub menu. In some cases, I’ve seen this take as long as 20 minutes.
#!/bin/sh # # # We need to modify the order of the --serial line in grub # in order to fix silly hardware bugs. In some cases, having # this in the wrong order causes grub to take an inordinate # amount of time to do anything before it actually auto-picks # the default menu option to boot. # PATH=/bin:/usr/bin:/sbin:/usr/sbin; export PATH # let's figure out what product type this is os=`uname -s` productname="product-no-dmidecode" if [ $os = "Linux" ] ; then productname=`dmidecode -s system-product-name 2>&1` case $productname in "PowerEdge M600") echo "console serial" ;; *) echo "serial console" ;; esac fi if [ $os = "SunOS" ] ; then # Bcfg2 server is unhappy with null output from probes echo "console" fi