I've upgraded to 5.20 from 5.17 and I've had to modify my /boot/bin/micro.bin to activate the VGA output.

 

After Upgraded the board didn't reactivate the VGA, and I've to do it manually.

 

Maybe some warning in the changelog will be an help to those have to do such modifications.

 

The upgrade process copied the bin dir to bin.old.

 

I have to apply "sudo apt-get upgrade" twice as the first run complain about come conflicting files and abort the upgrade, the second run did the job.

 

I'm running legacy debian Jessie image and upgraded from 5.17 to 5.20.

 

Now it seem to work well.

 

 

Fortunately old bin subdirectory has been preserved as bin.old and I did not lost my precious script.bin

If you don't want to lose your changes, just remove /boot/script.bin symlink and copy /boot/bin/$BOARD.bin to /boot/script.bin instead.

 

Implementing checks for changed files to ask users if they want to overwrite or keep their changes is possible in theory, but it's not that easy to do when /boot can be a separate fat partition and old releases like Debian Wheezy still needs to be supported.