#U boot splash screen install
Details on actually saving a new device tree through the flash.sh tool differs depending on release, but you get an exact match of your running system no matter which release you use (and this can be both saved as a reference and a copy edited before using the correct device tree install for that particular release). The second way to change this is by changing the device tree. However, I don’t know for sure if the method of merging cbootargs from the device tree would still override your change even after a saveenv (if the variable were not created through inheritance, then I’m sure it would be saved…you might have to test to see if the inheritance mechanism of cbootargs overwrites saveenv changes). Be sure to write down the original value in case you need to restore it later. To save permenently you would do the same edit, and then “saveenv”. Note that if you do this, then the change will be for only one boot, and will be lost after that…the cbootargs variable will revert to its old value. You can set a new value for a variable with the “setenv” command (“help setenv”). To specifically see the content of “cbootargs” you can run either of these: printenv cbootargs Within this shell you can run command “help” for general help, or “printenv” to see environment variables. *** Warning - bad CRC, using default environment If you use a serial console and start boot, but hit a key when it reaches this, it’ll stop and drop into a U-Boot shell: I> tegrabl_load_kernel_and_dtb: Done In "/boot/extlinux/nf " you’ll notice that the “APPEND” key/value pair has in it: APPEND $” is inherited from U-Boot.
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