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回复 1# 梦sui心飞
Setting the environment variable 'silent' to any value (i.e., having this variable present) will prevent U-boot
from sending any output to the debug port:
setenv silent 1
saveenv
When silent mode is enabled, you can still get a U-boot command prompt by pressing Enter during the
autoboot countdown after applying power to the board. The countdown will not be visible but the system
still gives you a chance to interrupt the boot process.
To disable silent mode, clear the 'silent' variable by typing:
setenv silent
saveenv
When the silent variable is set, U-boot will set the Linux console to null (empty, console=) on the command
line automatically. If you wish to silence the serial gettys, as well, you should disable (comment out) the
serial login gettys in the file /etc/inittab. |
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