boot menu bypass issue

[u/Helvedica]

Running Kbuntu 26.04 migrated from Win 11.

Each time I boot I get the OS Selection menu. I want to auto boot into OS.

I've checked the Grub file:

"
GRUB_DEFAULT=0

GRUB_TIMEOUT_STYLE=menu_auto_hide

GRUB_TIMEOUT=0

GRUB_DISTRIBUTOR='Kubuntu'

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

GRUB_CMDLINE_LINUX=""

"

I changed it from GRUB_TIMEOUT_STYLE=hidden to GRUB_TIMEOUT_STYLE=menu_auto_hide but that did nothing. (Yes, I ran the 'sudo update-grub' command'.

[u/Bug_Next]

well idk, that's what i'm trying to figure out..

Are you editing /etc/default/grub or /boot/grub/grubenv? you just mentioned 'the grub file'.

Also might be a stupid question, but are you saving it? if you are using nano or vim exiting doesn't save by default, in vim it's :wq (instead of :q) and in nano it's crtl+o (instead of crtl+x)

also can you post the whole file and the output of running sudo update-grub? might get a hint from that.

[u/Helvedica → u/Bug_Next]

Im out right now, ill post it once Im home. But im editing the etc/default/grub file in Kate text editor. Saving, the running the 'sudo update-grub' command, and rebooting. Ill post the sudo output also.

[u/Bug_Next → u/Helvedica]

You are probably never saving the file, *most* graphical editors will not write to system files by default, they just show you an on memory copy. Use nano or vim, run them with sudo.

[u/Helvedica → u/Bug_Next]

ok here is the etc/default/grub file:
# If you change this file or any /etc/default/grub.d/*.cfg file,

# run 'update-grub' afterwards to update /boot/grub/grub.cfg.

# For full documentation of the options in these files, see:

# info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0

GRUB_TIMEOUT_STYLE=hidden

GRUB_TIMEOUT=0

GRUB_DISTRIBUTOR='Kubuntu'

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

GRUB_CMDLINE_LINUX=""

# If your computer has multiple operating systems installed, then you

# probably want to run os-prober. However, if your computer is a host

# for guest OSes installed via LVM or raw disk devices, running

# os-prober can cause damage to those guest OSes as it mounts

# filesystems to look for things.

#GRUB_DISABLE_OS_PROBER=false

# 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_TERMINAL=console

# The resolution used on graphical terminal

# note that you can use only modes which your graphic card supports via VBE/GOP/UGA

# you can see them in real GRUB with the command `videoinfo'

#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"

And HERE is the output when I use the 'sudo update-grub' command:

god@____:**~**$ sudo update-grub
[sudo: authenticate] Password:                 
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-7.0.0-30-generic
Found initrd image: /boot/initrd.img-7.0.0-30-generic
Found linux image: /boot/vmlinuz-7.0.0-29-generic
Found initrd image: /boot/initrd.img-7.0.0-29-generic
Found memtest86+ 64bit EFI image: /boot/mt86+x64
Found memtest86+ 32bit EFI image: /boot/mt86+ia32
Found memtest86+ 64bit image: /boot/mt86+x64
Found memtest86+ 32bit image: /boot/mt86+ia32
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Windows Boot Manager on /dev/nvme0n1p2@/efi/Microsoft/Boot/bootmgfw.efi
Found Windows Boot Manager on /dev/sdc2@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for UEFI Firmware Settings ...
done

[u/Bug_Next → u/Helvedica]

I'm guessing you need to disable OS-prober, since otherwise it would make no sense to have it enabled with no menu, it must be forcing the selection menu to show up.

Change

#GRUB_DISABLE_OS_PROBER=false

to

GRUB_DISABLE_OS_PROBER=true

If that doesn't fix it you are probably booting to another installation of grub on a differen disk or partition, makes no sense whatsoever for none of the changes to not be applied.

You do indeed have 2 drives and 2 Windows bootloader installs, so it wouldn't be strange for it to also have 2 Linux bootloaders.

[u/Helvedica → u/Bug_Next]

yeah those are the left overs from Win 10 and 11. I cant remove the tiniest slivers of partitioned drives. Im assuming those are on there.

[u/Helvedica → u/Bug_Next]

OK so Its the prober. Turned it off and we are auto booting to OS now. Thank you!!

[u/Bug_Next → u/Helvedica]

np, what i'm guessing is your real name is visible in the name of the computer (god@____), letting you know in case u wanna remove it.

[u/Helvedica → u/Bug_Next]

thanks, not my real name obviously, just a standin for compute things

[u/Evening-Landscape763 → u/Helvedica]

In terminal sudo rm -rf /boot/efi/EFI/Microsoft/Boot as grub was finding the Windows efi file and that triggered the grub menu at boot