[issue]: Debian 11.6.0 bullseye live - boot conf replace not working

[TK1987]

Official FAQ

• I have checked the official FAQ.

Ventoy Version

1.0.90

What about latest release

Yes. I have tried the latest release, but the bug still exist.

Try alternative boot mode

Yes. I have tried them, but the bug still exist.

BIOS Mode

Both

Partition Style

MBR

Disk Capacity

64GB

Disk Manufacturer

SanDisk

Image file checksum (if applicable)

Yes.

Image file download link (if applicable)

https://cdimage.debian.org/debian-cd/current-live/i386/iso-hybrid/debian-live-11.6.0-i386-mate.iso

What happened?

I have tried replacing the "/boot/grub/grub.cfg", but no matter what I do, it keeps calling the original grub.cfg.

I did the exact same thing with an Ubuntu iso and it works fine with that.

I have also tried replacing a few other confs, but none work. When I select "check boot conf replace plugin configuration" on the tools page with F5, I get the following output:

iso:</ISO/Linux/ubuntu-mate-22.10-desktop-amd64.iso>  [OK]
org:</boot/grub/grub.cfg>  [OK]
new1:</.config/mate.cfg>  [OK]

iso:</ISO/Linux/debian-live-11.6.0-i386-mate.iso>  [OK]
org:</boot/grub/grub.cfg>  [OK]
new1:</.config/debian.cfg>  [OK]

iso:</ISO/Linux/debian-live-11.6.0-i386-mate.iso>  [OK]
org:</boot/grub/loopback.cfg>  [OK]
new1:</.config/debian.cfg>  [OK]

iso:</ISO/Linux/debian-live-11.6.0-i386-mate.iso>  [OK]
org:</EFI/debian/grub.cfg>  [OK]
new1:</.config/debian.cfg>  [OK]

Is there anything else I can try?

[ventoy]

ubuntu-mate-22.10-desktop-amd64.iso use grub2 as the bootloader in both Legacy BIOS mode and UEFI mode.
debian-live-11.6.0-i386-mate.iso use isolinux as the bootloader in Legacy BIOS mode and use grub2 as the bootloader in UEFI mode.

Your BIOS is legacy BIOS mode, so for debian-live-11.6.0-i386-mate.iso you need to replace /isolinux/isolinux.cfg or /isolinux/menu.cfg not grub.cfg.

[TK1987]

I have tried both UEFI and legacy mode.

When I boot legacy and replace the "/isolinux/menu.cfg" with a custom isolinux-menu, it is not replaced either. Instead, the original menu.cfg is always loaded.

When I boot with EFI, the original grub.cfg is loaded. I can load my custom cfg file by pressing the C button and entering the following:

search --no-floppy --set=ventoy --label Ventoy
configfile ($ventoy)/.config/debian.cfg

This works fine, but replacing the original cfg file does not.

[ventoy]

This is my test. (I add XXX in the menu title, you can see it works fine in the follwing gif).

[TK1987]

That's weird, now it works via legacy boot even though I didn't do anything other than remove the other replaced config.
Anyway, thanks. However, it still does not work for EFI boot.

[ventoy]

debian-live-11.6.0-i386-mate.iso is 32bit so you should test it in a IA32 UEFI machine, normally people's PC/laptop is UEFI 64, not IA32 UEFI.

If you test in IA32 UEFI machine, it's OK, the bellow is my test.

[TK1987]

debian-live-11.6.0-i386-mate.iso is 32bit so you should test it in a IA32 UEFI machine, normally people's PC/laptop is UEFI 64, not IA32 UEFI.

That's the problem, I tried it with a 64bit UEFI. Background is that I wanted to have tools in a persistent Debian live system that work under all systems, no matter if it is a 64bit UEFI or a 32bit legacy system.

I have now created separate persistent systems for 64bit and 32bit respectively. Not really nice, but it works.