Se você quiser apenas suprimir essas mensagens, em vez de corrigi-las, pode tentar ajustar o kernel.printk
sysctl, conforme descrito em man 2 syslog .
/proc/sys/kernel/printk is a writable file containing four integer values that influence kernel printk() behavior when printing or logging error messages. The four values are:
console_loglevel
Only messages with a log level lower than this value will be printed to the console. The default value for this field is DEFAULT_CONSOLE_LOGLEVEL (7), but it is set to 4 if the kernel command line contains the word "quiet", 10 if the kernel command line contains the word "debug", and to 15 in case of a kernel fault (the 10 and 15 are just silly, and equivalent to 8). The value of console_loglevel can be set (to a value in the range 1-8) by a syslog() call with a type of 8.
default_message_loglevel
This value will be used as the log level for printk() messages that do not have an explicit level. Up to and including Linux 2.6.38, the hard-coded default value for this field was 4 (KERN_WARNING); since Linux 2.6.39, the default value is a defined by the kernel configuration option CONFIG_DEFAULT_MESSAGE_LOGLEVEL, which defaults to 4.
minimum_console_loglevel
The value in this field is the minimum value to which console_loglevel can be set.
default_console_loglevel
This is the default value for console_loglevel.
Os números são descritos em kern_levels.h .
#define KERN_EMERG "<0>" /* system is unusable */
#define KERN_ALERT "<1>" /* action must be taken immediately */
#define KERN_CRIT "<2>" /* critical conditions */
#define KERN_ERR "<3>" /* error conditions */
#define KERN_WARNING "<4>" /* warning conditions */
#define KERN_NOTICE "<5>" /* normal but significant condition */
#define KERN_INFO "<6>" /* informational */
#define KERN_DEBUG "<7>" /* debug-level messages */
Você provavelmente deseja exibir mensagens CRITICAL, ALERT e EMERGENCY, portanto, definir tudo como kernel.printk = 3 3 3 3
in sysctl.conf
só deve fornecer mensagens que exijam que alguém faça algo para que o quiosque / computador funcione corretamente.