Hi everyone! I'm trying to get some output (other than just a little tux

Electronics
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1

Hi everyone!
I’m trying to get some output (other than just a little tux on screen) when booting my BBB from internal memory.

editing the /boot/uEnv.txt file and changing the line:
cmdline=quiet init=/lib/systemd/systemd

to: cmdline=debug init=/lib/systemd/systemd
or: cmdline=init=/lib/systemd/systemd

and neither change posts data to the screen. Does anyone have some pointers for helping me enable verbose output when booting?

2

How is ‘console’ set?

3

there is no ‘console’ in the uEnv.txt file

4

Try setting it to ‘tty0’. Check out /proc/cmdline after boot to see what it is set to. Likely ttyO0.

5

console=ttyO0,115200n8 root=UUID=28a9b0ba-3098-4704-8319-a0cf07333526 ro rootfstype=ext4 rootwait fixrtc debug init=/lib/systemd/systemd

6

Yeah, console=tty0 needs to be in there too to see kernel output at login.

7

Awesome, thanks buddy!
After adding: console=tty0
to my /boot/uEnv.txt file, I saw that eth0 was trying to get a DHCP lease (even though eth0 was not connected). Removing the ‘auto’ line from my /network/interfaces files resulted in a 20 second decrease in boot time.

8

Blog it! Wiki it! Share with the world. :smile:

9

done… and I don’t like it. http://www.jezra.net/blog/Beaglebone_console_output_and_a_faster_boot

Now I’m going to get back to hacking on some code