Re: [PATCH] installer: suppress kernel info/debug messages

["'Heinisch, Alexander' via isar-users" <isar-users@googlegroups.com>]

On Mon, 2026-01-05 at 11:24 +0200, Anton Mikanovich wrote:
> Applied to next, thanks.
Sry for the late reply - holiday season :-)

> 
> 23/12/2025 04:15, 'Badrikesh Prusty' via isar-users wrote:
> > Lower the kernel log level to 4 to suppress notice, info, and debug
> > messages on the console.
> > This prevents audit and driver messages from cluttering the screen
> > while keeping critical errors and systemd service status output
> > visible, resulting in a cleaner installer UI.
> > 
> > Signed-off-by: Badrikesh Prusty <badrikesh.prusty@siemens.com>
> > ---
> >   meta-isar/recipes-core/images/isar-image-installer.bb | 3 ++-
> >   1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/meta-isar/recipes-core/images/isar-image-installer.bb
> > b/meta-isar/recipes-core/images/isar-image-installer.bb
> > index 3511f3f6..a58f8849 100644
> > --- a/meta-isar/recipes-core/images/isar-image-installer.bb
> > +++ b/meta-isar/recipes-core/images/isar-image-installer.bb
> > @@ -11,7 +11,8 @@ DESCRIPTION = "Example of a ISAR based Installer
> > Image"
> >   INSTALLER_WKS_FILE ??= "installer-efi.wks.in"
> >   WKS_FILE = "${INSTALLER_WKS_FILE}"
> >   
> > -ADDITIONAL_KERNEL_CMDLINE ??= ""
> > +# Hide kernel warning/info/debug messages
> > +ADDITIONAL_KERNEL_CMDLINE ??= "loglevel=4"
> > 

I guess the reason for that is to have readable output while running
the target bootstrapper?
As for the installer image this service is run pretty late, maybe you
could reduce kernel logs when starting that service? (e.g.
PreStart=...)

> >   
> >   OVERRIDES .= "${@':unattended-installer' if
> > bb.utils.to_boolean(d.getVar('INSTALLER_UNATTENDED')) else ''}"
> >   ADDITIONAL_KERNEL_CMDLINE:append:unattended-installer = " \

-- 
Alexander Heinisch
Siemens AG
www.siemens.com

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