I actually found the relevant difference between a working 15.04 and a not working 16.04. In the function setup_unionfs () in scripts/casper (located in the ramdisk) the sequence of mounting changed from root partition then persistent partition (15.04) to 1st persistent then root partition (16.04) for whatever reason. If you change back (simple cut and paste the section) to the sequence of 15.04 and build then a new ramdisk you can run 16.04 with a persistent partition.
Hi to all,
I actually found the relevant difference between a working 15.04 and a not working 16.04. In the function setup_unionfs () in scripts/casper (located in the ramdisk) the sequence of mounting changed from root partition then persistent partition (15.04) to 1st persistent then root partition (16.04) for whatever reason. If you change back (simple cut and paste the section) to the sequence of 15.04 and build then a new ramdisk you can run 16.04 with a persistent partition.
br max