Sort of going on from investigating my boot times I've just realised I seem to be unable to see/start the grub menu on my system.
All I see is the BIOS boot sequence, finishing with the SATA drives being detected, then there is a blank screen (though the monitor indicates it is being driven) for several seconds followed finally by the login screen.
I have just changed /etc/default/grub to:-
GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT= GRUB_CMDLINE_LINUX=""
... and I still see absolutely nothing between BIOS and login screen.
Any ideas as to what I can do to see the grub screen? Apart from anything else if I have some sort of catastrophe it's going to be a bit difficult to get into single user/command line mode.