Is it like this ?

LABEL Custom Graphical Debian Installer
  SAY "Booting Custom Graphical Debian Installer..."
  linux /d-i/gtk/vmlinuz
  APPEND file=/cdrom/preseed/preseed.cfg auto=true
initrd=/d-i/gtk/initrd.gz video=vesa:ywrap,mtrr vga=788

anyway,using another append shouldn't be wrong because the debian
developers used,not me,in this way :

LABEL Graphical Debian Installer
  SAY "Booting Graphical Debian Installer..."
  linux /d-i/gtk/vmlinuz
  APPEND initrd=/d-i/gtk/initrd.gz append video=vesa:ywrap,mtrr vga=788

but it is also true that here they have omitted it :

LABEL Debian Installer with Speech Synthesis
  SAY "Booting Debian Installer with Speech Synthesis..."
  linux /d-i/gtk/vmlinuz
  APPEND initrd=/d-i/gtk/initrd.gz speakup.synth=soft

so,I don't know. Maybe both the solutions should be ok.

Il giorno gio 13 ott 2022 alle ore 21:17 Thomas Schmitt <scdbac...@gmx.net>
ha scritto:

> 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
>
>

-- 
Mario.

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