USB stopped working after removing m4 files

When I do the following USB host port is not powered anymore.

1.) execute the following on the UDOO Neo
udooer@udooneo:~$ sudo rm /boot/m4*
[sudo] password for udooer:
udooer@udooneo:~$ sudo halt

2.) Unplug power
3.) wait 30 seconds
4.) replug power
5.) -> USB not working anymore

I discovered this during my Yocto tests where I do not have a m4 fw yet. USB was working without m4 fw before.

Is this intended or not?

I've tested this on UDOObuntu v2.0rc1

 

Deleting files was the test.

In my Yocto build they had been missing because I was not aware of the dependency. Is there a link to uEnv.txt options?

Gesendet von meinem Nexus 4 mit Tapatalk

 

Are those variables the right ones?

https://github.com/graugans/meta-ud...-bsp/u-boot/u-boot-udooboard/udooneo/uEnv.txt

Code:

# Environment script for the UDOO Neo board
# save this file with unix-like newlines! (\n, 0x0A)

# Enable or Disable the Cortex M4 CPU
# m4_enabled=true|false
# any other value (or if the variable is not specified) will default to "true"
#m4_enabled=false

# Set the screen connected to the board
# video_output=hdmi|lvds7|lvds15|disabled
# any other value (or if the variable is not specified) will default to "hdmi"
#video_output=hdmi

# Select weather to use custom device tree or not
# Put the custom device tree file in the folder "dts-overlay" in your boot partition
# use_custom_dtb=true|false
# any other value (or if the variable is not specified) will default to "false"
#use_custom_dtb=true