Kernel boot arguments

Ake · December 21, 2016

Hi.

I have Cubieboard 1 with Armbian Jessie installed on NAND. I've tried to disable output during boot as described here: https://docs.armbian.com/User-Guide_Fine-Tuning/#how-to-toggle-boot-output, but there are no existing boot.cmd and boot.scr in boot partition. I've found out that uEnv.txt have same purpose but it seems that editing this file doesn't affects arguments, /proc/cmdline remains the same.

Igor · December 21, 2016

NAND installation uses old stock uboot which require special treat.

Check/adjust "extraargs" within your uEnv.txt file.

Ake · December 21, 2016

/boot/uEnv.txt:

console=tty1
root=/dev/nand2 rootwait
extraargs="console=tty1 hdmi.audio=EDID:0 disp.screen0_output_mode=EDID:0 consoleblank=0 loglevel=1 sunxi_ve_mem_reserve=128"

dmesg:

Kernel command line: console=ttyS0,115200 root=/dev/nand2 rootwait loglevel=8 panic=10 console=tty1 hdmi.audio=EDID:0 disp.screen0_output_mode=EDID:0 consoleblank=0 loglevel=1

Does uEnv.txt require any actions other than editing?

Ake · December 22, 2016

Problem is solved.

My mistake was adjusting uEnv.txt located in first partition (/dev/nanda) which mounts to /boot. In fact, actual uEnv.txt located in /boot directory of second (root) partiton (/dev/nandb). I've booted from SD, edited it and now everything works properly.