What is raw keyboard mode?
In the magic sysrq key combinations, there is the combination alt+sysrq+r which, according to wikipedia, does the following:
magic-sysrq
sysrq won’t reboot with a keystroke, but will with echo “b” > /proc/sysrq-trigger
CentOS 6.2, 2.6.32-220.el6.x86_64 laptop. SysRQ is enabled for keyboard input, as is witnessed by: