Re: Some of the parameters used in my genisoimage command don't produce a bootable ISO image
Hi,
Mario Marietto wrote:
> You are right. It works without using the APPEND option
Yeah. Once again guessed right. :))
> I don't know if it's correct to use something like this in the
ISOLINUX/menu.cfg file :
> LABEL Custom Graphical Debian Installer
> SAY "Booting Custom Graphical Debian Installer..."
> linux /d-i/gtk/vmlinuz
> APPEND boot=casper file=/cdrom/preseed/preseed.cfg auto=true initrd=/d-i/gtk/initrd.gz append video=vesa:ywrap,mtrr vga=788
(I think there is again a surplus "append" in the "APPEND" line.)
Let's read
https://wiki.syslinux.org/wiki/index.php?title=Config
"APPEND options...
Add one or more options to the kernel command line. These are added
to both, automatic and manual boots. The options are added at the
very beginning of the kernel command line, usually permitting
explicitly-entered kernel options to override them. This is the
equivalent of the LILO "append" option.
...
LINUX image
Load image as a Linux-like kernel. MEMDISK is an example of a non-Linux
kernel loaded in a Linux-like fashion."
So with ISOLINUX, one has to add the kernel arguments by APPEND and the
initrd by kernel argument "initrd=".
With GRUB2 one adds the kernel arguments to the "linux" command line but
the initrd is specified by a separate "initrd" command.
(Further there are still Legacy GRUB configuration examples around
in files named "menu.lst".)
> Otherwise,is something like this ok ?
> linux /d-i/gtk/vmlinuz boot=casper file=/cdrom/preseed/preseed.cfg auto=true initrd=/d-i/gtk/initrd.gz append video=vesa:ywrap,mtrr vga=788
Only if i ignore the surplus "append". :))
Then i stumble over "boot=casper".
The text
https://www.kernel.org/doc/html/v5.10/admin-guide/kernel-parameters.html
does not list a "boot=" option.
It might be that some software in the Live ISO looks into something like
the pseudo-file
/proc/cmdline
and acts if it finds "boot=casper" in the content of line "BOOT_IMAGE=".
Have a nice day :)
Thomas
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