How to hide kernel boot message on the Google Coral ?
# cat /etc/debian_version
10.0
but i can't find the grub file (i tried, like for debian, /etc/default/grub ... nothing) to edit and add "quiet" (like for a regular Ubuntu/Debian), then regenerate grub :(
embeded linux usually uses uboot instead of grub as it is too large. Specifics on how to customizing kernel should take more researches, however, you can add loglevel=0 to the kernel command line to eliminate some kernel messages.
Download boot.txt:
$ curl https://coral.googlesource.com/uboot-imx-debian/+/refs/heads/master/debian/boot.txt\?format\=TEXT | base64 --decode | tee boot.txt > /dev/null
Install mkimage:
$ sudo apt install u-boot-tools
Make your necessary changes in the cmdline="" line, for this example, we need to add "quiet loglevel=0":
cmdline=<preexsisting> + quiet loglevel=0
compile to boot.scr:
$ mkimage -A arm -T script -O linux -d boot.txt boot.scr
replace old boot image file
$ mv boot.scr > /boot
Reboot and the new kernel params should be loaded.
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