I have set Grub timeout is 4 sec. But sometimes, grub start to boot after 30 secs. Why? What's wrong?

Question

gedit /etc/default/grub output is:

GRUB_DEFAULT=0
GRUB_TIMEOUT=4
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
GRUB_CMDLINE_LINUX=""

Let me know if u need more output. This happens like 1 out of 5 times. But I do not want this to happen anymore. Any help would be appreciated.

It is just using the default timeout value. See grep timeout /boot/grub/grub.cfg output. It happened to me also once. But, I do not remember the case. — FedKad, May 18 '19 at 15:50
@FedonKadifeli u are right. I am seeing an output, "... set timeout=30 ...." What should I do now? Decrease it to 4 sec? Is this a normal thing? Because usually people only recommend editing "etc/default/grub", so..?! — Pranav, May 18 '19 at 15:52
You might also look at https://askubuntu.com/a/244752/283721 — Charles Green, May 18 '19 at 15:57

score 3 · Accepted Answer · answered May 18 '19 at 15:56

3

It happens on hard reset or forced reboot.

The value of 30 seconds is set in /etc/grub.d/00_header

  set timeout=${GRUB_RECORDFAIL_TIMEOUT:-30}

If you want to change it, you have to specify your own value in /etc/default/grub

sudo editor /etc/default/grub

Add new line:

GRUB_RECORDFAIL_TIMEOUT=4

and update grub:

update-grub2

answered May 18 '19 at 15:56

Comar

1,485

thanks. I hope this works. Is there a way to confirm this? – Pranav May 18 '19 at 16:14
possibly by holding power button down until PC goes off, but I don't recommend it, since this can mess your hard drive or filesystem – Comar May 18 '19 at 19:11

I have set Grub timeout is 4 sec. But sometimes, grub start to boot after 30 secs. Why? What's wrong?

1 Answers1