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

[Badrikesh Prusty]

Lower the kernel log level to 3 to suppress warning, 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 <badrikes...@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..fde81a19 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=3"

OVERRIDES .= "${@':unattended-installer' if bb.utils.to_boolean(d.getVar('INSTALLER_UNATTENDED')) else ''}"
ADDITIONAL_KERNEL_CMDLINE:append:unattended-installer = " \
--
2.47.3

[Florian Bezdeka]

On Fri, 2025-12-19 at 09:36 -0500, 'Badrikesh Prusty' via isar-users
wrote:

> Lower the kernel log level to 3 to suppress warning, 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.

Hiding warnings is not a good idea. If something is wrong on the target
the user should know. It will not be the first time that a problem is
hidden (and comes back in "urgent mode") just because someone decided to
suppress warnings.

>
> Signed-off-by: Badrikesh Prusty <badrikes...@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..fde81a19 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 = "${INSTALLER_WKS_FILE}"
>
> -ADDITIONAL_KERNEL_CMDLINE ??= ""
> +# Hide kernel warning/info/debug messages
> +ADDITIONAL_KERNEL_CMDLINE ??= "loglevel=3"
>
> OVERRIDES .= "${@':unattended-installer' if bb.utils.to_boolean(d.getVar('INSTALLER_UNATTENDED')) else ''}"
> ADDITIONAL_KERNEL_CMDLINE:append:unattended-installer = " \
> --
> 2.47.3
>

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[Badrikesh Prusty]

Hi,

Agreed, hiding warning is a bad idea. I will increase loglevel to 4 to show the warning messages as well and send patch v2.

Thanks,

Badrikesh

[Badrikesh Prusty]

Updated patch link:  [PATCH] installer: suppress kernel info/debug messages