How can I enter BIOS in a virtualized RedHat Enterprise Linux 5.6 running in KVM ?
I can send Ctrl+Alt+Delete, but GRUB boot loader loads up so fast I cannot press F2 / Delete.
The BIOS used by KVM does not have a setup interface accessible from the VM console. All options which need to be configured through the BIOS setup in a physical computer (e.g., boot device list) are set through kvm command line options, which in RHEL5 are usually controlled through libvirt and its management tools.
Note that you need to turn off the VM and start it again for the new options to take effect (just rebooting the VM from inside it, e.g. by Ctrl+Alt+Delete, is not enough — it does not restart the kvm process).