Linux distros typically ship with the "quiet" boot parameter, and a userspace splash (e.g. plymouth) in order to control what is shown on screen during boot so that ordinary users are not troubled by boot messages that they don't understand. However, any error messages printed before userspace has started are going to show on-screen and hence we should only log errors that are really going to prevent use of the system. It seems that many consumer systems for years now have come with imperfect ACPI tables, and Linux reacts to this with highly verbose error messages logged from early boot such as these on the Asus X541UJ: ACPI Error: [PRT0] Namespace lookup failure, AE_ALREADY_EXISTS (20170119/dswload-378) ACPI Exception: AE_ALREADY_EXISTS, During name lookup/catalog (20170119/psobject-227) ACPI Exception: AE_ALREADY_EXISTS, (SSDT:SataTabl) while loading table (20170119/tbxfload-228) ACPI Error: 1 table load failures, 8 successful (20170119/tbxfload-246) We've seen cases where these messages generate support tickets or product returns, but it seems to me that the vast majority of ACPI error messages (when occurring on end-user systems) are not going to affect system boot, so it would be better if they didn't spam the screen when booting with "quiet". Demote the messages to KERN_WARNING in order to avoid them appearing on the console. Signed-off-by: Daniel Drake <drake@xxxxxxxxxxxx> --- include/acpi/platform/aclinux.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h index 1b473efd9eb6..6bdb523a6d55 100644 --- a/include/acpi/platform/aclinux.h +++ b/include/acpi/platform/aclinux.h @@ -171,12 +171,12 @@ #define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_get_next_filename #define ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_close_directory -#define ACPI_MSG_ERROR KERN_ERR "ACPI Error: " -#define ACPI_MSG_EXCEPTION KERN_ERR "ACPI Exception: " +#define ACPI_MSG_ERROR KERN_WARNING "ACPI Error: " +#define ACPI_MSG_EXCEPTION KERN_WARNING "ACPI Exception: " #define ACPI_MSG_WARNING KERN_WARNING "ACPI Warning: " #define ACPI_MSG_INFO KERN_INFO "ACPI: " -#define ACPI_MSG_BIOS_ERROR KERN_ERR "ACPI BIOS Error (bug): " +#define ACPI_MSG_BIOS_ERROR KERN_WARNING "ACPI BIOS Error (bug): " #define ACPI_MSG_BIOS_WARNING KERN_WARNING "ACPI BIOS Warning (bug): " /* -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
