How do I disable messages or logging from printing on the console/virtual terminals?
My wireless driver is noisy. It prints out messages to the console every 10-30 seconds. So, if I'm working on VT1 or something, I get messages scrolling by all the time. Is there a way to shut this feature off? I like working on the virtual terminals, but this is making it hard to deal with. :)
Any ideas?
You can use the command
sudo dmesg -n 1to suppress all messages from the kernel (and its drivers) except panic messages from appearing on the console.
To fix at each boot, add the command to:
/etc/rc.localGreat, that is just what I was looking for. :)
The `dmesg -n 1` must be run as root, e.g. `sudo dmesg -n 1`.
dmesgcomes with two handy options for that:-D, --console-off disable printing messages to console -E, --console-on enable printing messages to consoledmesg -Dis just a shortcut fordmesg -n 1, except that it stores the current log level, so that you can easily restore it withdmesg -E. So it's a bit more convenient than changing the log level withdmesg -n.Additionally, you can check the current log level with:
$ cat /proc/sys/kernel/printk 7 4 1 7man klogctlfor more explanations on these numbers.../proc/sys/kernel/printkYou can also set the log level directly with
echo 1 > /proc/sys/kernel/printkwhich is basically what
dmesgis doing.The format of that file is explained at: https://superuser.com/a/793692/128124
loglevelcommand line boot parameterSets the initial value at boot time, which allows you to see pre-init messages.
License under CC-BY-SA with attribution
Content dated before 6/26/2020 9:53 AM
dpb 9 years ago
Great, that is just what I was looking for. :)