Using all of the solutions described on this site, setting the Grub menu wait time to zero does not work.
I did the following:
sudo cp /etc/default/grub /etc/default/grub.old sudo gedit /etc/default/grub
Uncommented this line, per instruction.
Set this line, per instruction.
/etc/default/grub now looks like this:
# If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT="0" GRUB_HIDDEN_TIMEOUT="0" GRUB_HIDDEN_TIMEOUT_QUIET="true" GRUB_TIMEOUT="0" GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`" GRUB_CMDLINE_LINUX_DEFAULT="quiet splash profile" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL="console" # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE="640x480" # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID="true" # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1"
Having edited the /etc/default/grub file -->
After restarting, Grub wait-time is still set to 10 seconds.
I was able to get the wait time to 1 second with just one simple change. Edited these two lines in /etc/default/grub
Commented the first back to the default value, and set GRUB_TIMEOUT to "1".
This solution works, but my question is:
Where is the trap that resets the TIMEOUT value to 10 seconds when GRUB-TIMEOUT is set to "0".
Maybe one of the "IF" tests in grub.cfg??