I just did a clean install of Debian xfce4 from the Squeeze live CD.
I found out that issuing reboot, does not really reboot. Instead of going all the way to grub menu, it shuts all services, and reload the kernel and all services.
I have never seen such behaviour, and I’m guessing it is somehow related to the new grub2.
Can some enlighten me ?
If you don’t see the POST process and GRUB prompt, it’s conceivable you have kexec-tools installed (and enabled): kexec replaces reboots with a “warm reload” into whatever kernel is the target of /vmlinuz. This is handy for minimising a server’s downtime during a kernel upgrade if its BIOS takes ages to initialise hardware, but less handy if you wanted to reboot into your Windows install!