I have two operating systems: Windows 8.1 and Ubuntu 14.04. I want to hide grub menu. I'm using grub 2.02~beta2-9. I tried following combinations of
grub menu is visible for 10 seconds (if timeout is set for value larger than 0 it is displayed correctly: GRUB_TIMEOUT=5 - 5 seconds delay)
grub menu is visible, I also tried GRUB_HIDDEN_TIMEOUT=false and setting both GRUB_TIMEOUT and GRUB_HIDDEN_TIMEOUT to zero and non-zero values
grub menu is visible for 1 second, tried also GRUB_TIMEOUT_STYLE=countdown with the same result, if GRUB_TIMEOUT is set to 0, 10 seconds delay
After each change I type
update-grub and restart computer to see the results.
According to GRUB documentation found in
info -f grub -n 'Simple configuration' second way is depricated. The rightous way is the third one - by using GRUB_TIMEOUT_STYLE, but unfortunately it doesn't work. It's probably some kind of a bug.