Comment 43 for bug 1652270

I had a non-conforming result:

I imaged an microSD card with ubuntu-16.04-preinstalled-server-armhf+raspi3.img

I tested three methods of editing the config.txt file to apply the above mentioned changes related to `device_tree_address=0x02008000`

Test #1: edited the file before first boot.
Result: "script failed" error and timeouts attempting TFTP to get boot files

Test #2: booted the RPi3 and immediately edited the config.txt file and immediately rebooted
Result: "script failed" error and timeouts attempting TFTP to get boot files

Test #3: booted the RPi3, let it sit idle for 10 minutes and then did a few tasks such as update the tzdata. then rebooted. Then edited the config.txt file and rebooted again
Result: first reboot was successful and the second reboot resulted in "script failed" error and timeouts attempting TFTP to get boot files

It appeared that as soon as the device_tree_address was changed, the RPi3 would not boot after.

Test 4: mount the microSD card and revert the edits to config.txt
Result: boot failed with a data dump.