Hi Reza!

Reza Alizadeh Majd 写道：
> I want to hide the boot process logs in Guix, having a quick 
> search I
> found that I can use following options in grub configuration 
> file:
>
>
> GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Forget this line.  No part of it makes sense on Guix (except 
‘quiet’, which is handled by the kernel itself, and see below for 
that).

GRUB_CMDLINE_LINUX_DEFAULT (and similar-looking variables) is used 
only by the ‘update-grub’ utility on some distributions that uses 
a bash configuration file to configure a bash script that creates 
the final (bash-like) grub.cfg.

As it sounds, it's a pretty horrible system, and it's not used by 
Guix at all.  grub.cfg is generated entirely by Guix itself, based 
on your operating-system record and previous system generations.

Adding ‘splash’ is equally specific to some other distribution, 
and has no effect on Guix System.

There is no splash screen code in Guix.  Plymouth has been 
packaged, but there's no code to launch it at boot.  I haven't 
even managed to make a ‘flicker-free boot’ happen on my i915.

> the problem is that based on current bootloader definition, 
> there is no
> option exposed for additional grub configurations (or I might 
> missed
> the proper option for this).

  (operating-system
    ...
    (kernel-arguments '("quiet")))

This will hide many but not all messages.  A silent boot, with or 
without a splash screen, is currently not a feature of Guix.

Kind regards,

T G-R